diff --git a/sources/MyToolkitMVVM/ObservableObject.cs b/sources/MyToolkitMVVM/ObservableObject.cs
index 8799abb..5be73e1 100644
--- a/sources/MyToolkitMVVM/ObservableObject.cs
+++ b/sources/MyToolkitMVVM/ObservableObject.cs
@@ -1,4 +1,5 @@
 using System.ComponentModel;
+using System.Diagnostics;
 using System.Runtime.CompilerServices;
 
 namespace MyToolkitMVVM;
@@ -17,11 +18,13 @@ public class ObservableObject : INotifyPropertyChanged
         if (EqualityComparer<T>.Default.Equals(member, value)) return;
         member = value;
         OnPropertyChanged(propertyName);
+        Debug.WriteLine("PropertyChanged "+propertyName);
     }
     protected void SetProperty<T>(T member, T value,Action<T> action, [CallerMemberName] string propertyName = null)
     {
         if (EqualityComparer<T>.Default.Equals(member, value)) return;
         action(value);
         OnPropertyChanged(propertyName);
+        Debug.WriteLine("PropertyChanged " + propertyName);
     }
 }
diff --git a/sources/PocketBook/Applicative_VM/NavigatorVM.cs b/sources/PocketBook/Applicative_VM/NavigatorVM.cs
index 42dceee..2e9eb9f 100644
--- a/sources/PocketBook/Applicative_VM/NavigatorVM.cs
+++ b/sources/PocketBook/Applicative_VM/NavigatorVM.cs
@@ -8,17 +8,12 @@ namespace PocketBook.Applicative_VM
     public class NavigatorVM
     {
         public ICommand Navigateto { get; private set; }
-        public ICommand SeeDetailPage { get; private set; }
 
         public NavigatorVM()
         {
             Navigateto = new Command<string>(
                 async (string page) => await Shell.Current.GoToAsync(page)
             );
-
-            SeeDetailPage = new Command(
-                async () => await Shell.Current.GoToAsync("BookDetail")
-            );
         }
     }
 }
diff --git a/sources/PocketBook/Applicative_VM/TousPageVM.cs b/sources/PocketBook/Applicative_VM/TousPageVM.cs
new file mode 100644
index 0000000..7e110f4
--- /dev/null
+++ b/sources/PocketBook/Applicative_VM/TousPageVM.cs
@@ -0,0 +1,33 @@
+using System;
+using System.Diagnostics;
+using System.Windows.Input;
+using MyToolkitMVVM;
+using ViewModel;
+
+namespace PocketBook.Applicative_VM
+{
+	public class TousPageVM : BaseViewModel
+    {
+        public ICommand NavigateDetailPage { get; private set; }
+
+        public NavigatorVM NavigateCommandBooks { get; private set; }
+        public ScanMenuVM ScanMenuVM { get; private set; }
+        public ManagerVM Manager { get; private set; }
+
+        public TousPageVM(NavigatorVM navigation,ManagerVM manager, ScanMenuVM scanMenuVM)
+        {
+            ScanMenuVM = scanMenuVM;
+            Manager = manager;
+            NavigateCommandBooks = navigation;
+
+            NavigateDetailPage = new Command<BookVM>(book =>
+            {
+                Debug.WriteLine(book.Id);
+                Manager.LoadBookFromManager(book.Id);
+                Debug.WriteLine(Manager.SelectedBook.Title);
+                NavigateCommandBooks.Navigateto.Execute("BookDetail");
+            });
+		}
+	}
+}
+
diff --git a/sources/PocketBook/MauiProgram.cs b/sources/PocketBook/MauiProgram.cs
index 268316d..455e933 100644
--- a/sources/PocketBook/MauiProgram.cs
+++ b/sources/PocketBook/MauiProgram.cs
@@ -42,10 +42,11 @@ public static class MauiProgram
 
             });
         builder.Services
-            .AddSingleton<ILibraryManager,LibraryStub>()
-            .AddSingleton<IUserLibraryManager,UserLibraryStub>()
+            .AddSingleton<ILibraryManager, LibraryStub>()
+            .AddSingleton<IUserLibraryManager, UserLibraryStub>()
             .AddSingleton<NavigatorVM>()
             .AddSingleton<ScanMenuVM>()
+            .AddSingleton<TousPageVM>()
             .AddSingleton<MainPage>()
             .AddSingleton<TousPage>()
             .AddSingleton<BookDetail>()
diff --git a/sources/PocketBook/Pages/BookDetail.xaml b/sources/PocketBook/Pages/BookDetail.xaml
index 85b0e30..8c02c9e 100644
--- a/sources/PocketBook/Pages/BookDetail.xaml
+++ b/sources/PocketBook/Pages/BookDetail.xaml
@@ -6,14 +6,14 @@
              Title="Détails du livre"
              Shell.ForegroundColor="{StaticResource Primary}"
              Shell.BackgroundColor="{StaticResource TopBackgroundGrey}"
-             xmlns:toolkit="http://schemas.microsoft.com/dotnet/2022/maui/toolkit">
+             x:Name="root">
 
         <ScrollView>
             <StackLayout>
                 <StackLayout Orientation="Horizontal" Margin="15,0,0,20">
-                    <Image x:Name="bookImage" Source="buveurencre.jpg" Margin="0,0,10,0" WidthRequest="90" HeightRequest="160"/>
+                    <Image Source="{Binding SelectedBook.Image}" Margin="0,0,10,0" WidthRequest="90" HeightRequest="160"/>
                     <StackLayout Orientation="Vertical">
-                        <Label x:Name="titreBook" FontFamily="Pro-Display-Semibold" FontSize="17" Margin="0,15,0,0"/>
+                        <Label Text="{Binding SelectedBook.Title}" FontFamily="Pro-Display-Semibold" FontSize="17" Margin="0,15,0,0"/>
                         <local:Stars NbStars="1" Margin="0,90,0,0"/>
                     </StackLayout>
                 </StackLayout>
@@ -26,12 +26,12 @@
                     <Line BackgroundColor="{StaticResource LineColor1}"/>
                     <StackLayout >
                         <Label Text="Auteur" Style="{StaticResource LabelStyleDetailBook3}"/>
-                        <Label x:Name="bookAuteur" Style="{StaticResource LabelStyleDetailBook4}"/>
+                        <Label Text="{Binding SelectedBook.BookFirstAuthor}" Style="{StaticResource LabelStyleDetailBook4}"/>
                     </StackLayout>
                     <Line BackgroundColor="{StaticResource LineColor1}"/>
                     <StackLayout>
                         <Label Text="Maison d'édition" Style="{StaticResource LabelStyleDetailBook3}"/>
-                        <Label x:Name="bookEdition" Style="{StaticResource LabelStyleDetailBook4}"/>
+                        <Label Text="{Binding SelectedBook.BookFirstPublisher}" Style="{StaticResource LabelStyleDetailBook4}"/>
                     </StackLayout>
                     <Line BackgroundColor="{StaticResource LineColor1}"/>
                     <StackLayout Margin="0,0,0,10">
@@ -44,21 +44,21 @@
                         <Label Text="Détails" Style="{StaticResource LabelStyleDetailBook3}"/>
                         <StackLayout Orientation="Horizontal">
                             <Label Text="Nombre de pages" Style="{StaticResource LabelStyleDetailBook4}"/>
-                            <Label x:Name="bookNbPages" Style="{StaticResource LabelStyleDetailBook2}"/>
+                            <Label Text="{Binding SelectedBook.Nbpages}" Style="{StaticResource LabelStyleDetailBook2}"/>
                         </StackLayout>
                         <StackLayout Orientation="Horizontal">
                             <Label Text="Langue" Style="{StaticResource LabelStyleDetailBook4}"/>
-                            <Label x:Name="bookLangue" Style="{StaticResource LabelStyleDetailBook2}"/>
+                            <Label Text="{Binding SelectedBook.Language}" Style="{StaticResource LabelStyleDetailBook2}"/>
                         </StackLayout>
                         <StackLayout Orientation="Horizontal">
                             <Label Text="ISBN" Style="{StaticResource LabelStyleDetailBook4}"/>
-                            <Label x:Name="bookISBN" Style="{StaticResource LabelStyleDetailBook2}"/>
+                            <Label Text="{Binding SelectedBook.ISBN}" Style="{StaticResource LabelStyleDetailBook2}"/>
                         </StackLayout>
                         <Line BackgroundColor="{StaticResource LineColor1}"/>
                         <Label Text="Statut de lecture" Style="{StaticResource LabelStyleDetailBook3}"/>
                         <StackLayout Orientation="Horizontal">
                             <Label Text="Statut" Style="{StaticResource LabelStyleDetailBook4}"/>
-                            <Label x:Name="bookStatus" Style="{StaticResource LabelStyleDetailBook2}"/>
+                            <Label Text="{Binding SelectedBook.BookStatus}" Style="{StaticResource LabelStyleDetailBook2}"/>
                         </StackLayout>
                         <Line BackgroundColor="{StaticResource LineColor1}"/>
                         <Label Text="Bibliothèque" Style="{StaticResource LabelStyleDetailBook3}"/>
diff --git a/sources/PocketBook/Pages/BookDetail.xaml.cs b/sources/PocketBook/Pages/BookDetail.xaml.cs
index 27145bc..22473aa 100644
--- a/sources/PocketBook/Pages/BookDetail.xaml.cs
+++ b/sources/PocketBook/Pages/BookDetail.xaml.cs
@@ -5,19 +5,22 @@ namespace PocketBook;
 public partial class BookDetail : ContentPage
 {
 
-    public NavigatorVM NavigateCommandBooks { get; private set; }
+    public TousPageVM TousPageVM { get; private set; }
 
-    public BookDetail(NavigatorVM navigator)
+    public BookDetail(TousPageVM tousPageVM)
     {
-        NavigateCommandBooks = navigator;
+        //NavigateCommandBooks = navigator;
         InitializeComponent();
-        titreBook.Text = "La horde du contrevent";
+        /*titreBook.Text = "La horde du contrevent";
         bookAuteur.Text = "Alain Damasio";
         bookEdition.Text = "Fayard (2019)";
         bookNbPages.Text = "700";
         bookISBN.Text = "9854645645456";
         bookLangue.Text = "français";
         bookStatus.Text = "Non lu";
-        bookAdd.Text = "15 août 2013";
+        bookAdd.Text = "15 août 2013";*/
+
+        TousPageVM = tousPageVM;
+        BindingContext = TousPageVM.Manager;
     }
 }
\ No newline at end of file
diff --git a/sources/PocketBook/Pages/Composants/ContentView/ContentViewBook.xaml b/sources/PocketBook/Pages/Composants/ContentView/ContentViewBook.xaml
index 33cf6ac..a57c50d 100644
--- a/sources/PocketBook/Pages/Composants/ContentView/ContentViewBook.xaml
+++ b/sources/PocketBook/Pages/Composants/ContentView/ContentViewBook.xaml
@@ -4,9 +4,6 @@
              x:Class="PocketBook.ContentViewBook"
              xmlns:local="clr-namespace:PocketBook"
              x:Name="root">
-    <ContentView.GestureRecognizers>
-        <TapGestureRecognizer CommandParameter="{Binding CommandParameter, Source={x:Reference root}}" Command="{Binding Command, Source={x:Reference root}}"/>
-    </ContentView.GestureRecognizers>
     <VerticalStackLayout Margin="15,0,0,0">
         <StackLayout Orientation="Horizontal" Margin="0,5,0,0">
             <Image x:Name="bookImage" Source="{Binding BookImage, Source={x:Reference root}}"  Margin="0,0,10,0" WidthRequest="75" HeightRequest="110"/>
diff --git a/sources/PocketBook/Pages/TousPage.xaml b/sources/PocketBook/Pages/TousPage.xaml
index 8ec77e9..5505d69 100644
--- a/sources/PocketBook/Pages/TousPage.xaml
+++ b/sources/PocketBook/Pages/TousPage.xaml
@@ -13,24 +13,23 @@
 
     <ContentPage.ToolbarItems>
         <ToolbarItem Text="Ajouter" Priority="1"
-                     Order="Primary" IconImageSource="plus.png" Command="{Binding ScanMenuVM.ShowScanMenu}"/>
+                     Order="Primary" IconImageSource="plus.png" Command="{Binding TousPageVM.ScanMenuVM.ShowScanMenu}"/>
         <ToolbarItem Text="Order" Priority="2" 
                      Order="Primary" IconImageSource="arrows.png"/>
     </ContentPage.ToolbarItems>
 
     <AbsoluteLayout>
-        <local:ScanMenuView Command="{Binding ScanMenuVM.ModalISBN}" x:Name="scanMenu" IsVisible="{Binding ScanMenuVM.ScanMenuIsVisible}"
+        <local:ScanMenuView Command="{Binding TousPageVM.ScanMenuVM.ModalISBN}" x:Name="scanMenu" IsVisible="{Binding TousPageVM.ScanMenuVM.ScanMenuIsVisible}"
                             Margin="0, 8, 8, 0"
                             AbsoluteLayout.LayoutBounds="1, 0" 
                             AbsoluteLayout.LayoutFlags="PositionProportional" ZIndex="1"/>
         <StackLayout AbsoluteLayout.LayoutFlags="All" AbsoluteLayout.LayoutBounds="0,0,1,1">
             <ScrollView VerticalOptions="StartAndExpand">
                 <VerticalStackLayout>
-                    <local:TitledAuthor NameText="Alain Damasio"/>
-                    <CollectionView ItemsSource="{Binding Manager.Books}">
-                            <CollectionView.ItemTemplate>
+                    <CollectionView x:Name="collection" IsGrouped="True" GroupHeaderTemplate="{StaticResource groupHeaderTemplate}" SelectionMode="Single" SelectionChangedCommand="{Binding TousPageVM.NavigateDetailPage, Source={x:Reference root}}" SelectionChangedCommandParameter="{Binding SelectedItem, Source={x:Reference collection}}" ItemsSource="{Binding TousPageVM.Manager.GroupedBooks}">
+                        <CollectionView.ItemTemplate>
                             <DataTemplate>
-                                <local:ContentViewBook Margin="0,5,0,0" Nbstars="1" Command="{Binding NavigateCommandBooks.SeeDetailPage, Source={x:Reference root}}" BookImage="{Binding Image}" BookName="{Binding Title}"  AutorName="{Binding BookFirstAuthor}" BookStatus="{Binding BookStatus}"/>
+                                <local:ContentViewBook Margin="0,5,0,0" Nbstars="2" BookImage="{Binding Image}" BookName="{Binding Title}"  AutorName="{Binding BookFirstAuthor}" BookStatus="{Binding BookStatus}"/>
                             </DataTemplate>
                         </CollectionView.ItemTemplate>
                     </CollectionView>
diff --git a/sources/PocketBook/Pages/TousPage.xaml.cs b/sources/PocketBook/Pages/TousPage.xaml.cs
index c20e3db..e933cba 100644
--- a/sources/PocketBook/Pages/TousPage.xaml.cs
+++ b/sources/PocketBook/Pages/TousPage.xaml.cs
@@ -1,3 +1,4 @@
+using System.Diagnostics;
 using CommunityToolkit.Maui.Core;
 using CommunityToolkit.Maui.Views;
 using PocketBook.Applicative_VM;
@@ -7,15 +8,11 @@ namespace PocketBook;
 
 public partial class TousPage : ContentPage
 {
-    public NavigatorVM NavigateCommandBooks { get; private set; }
-    public ScanMenuVM ScanMenuVM { get; private set; }
-    public ManagerVM Manager { get; private set; }
+    public TousPageVM TousPageVM { get; private set; }
 
-    public TousPage(NavigatorVM navigation,ScanMenuVM scanMenuVM, ManagerVM manager)
+    public TousPage(TousPageVM tousPageVM)
     {
-        ScanMenuVM = scanMenuVM;
-        Manager = manager;
-        NavigateCommandBooks = navigation;
+        TousPageVM = tousPageVM;
         InitializeComponent();
         BindingContext = this;
     }
diff --git a/sources/PocketBook/Resources/Styles/Colors.xaml b/sources/PocketBook/Resources/Styles/Colors.xaml
index 10853db..35f987d 100644
--- a/sources/PocketBook/Resources/Styles/Colors.xaml
+++ b/sources/PocketBook/Resources/Styles/Colors.xaml
@@ -25,6 +25,10 @@
     <Color x:Key="selectorBackgroundDark">#323137</Color>
     <Color x:Key="scanMenuBackgroundLight">#F4F4F4</Color>
     <Color x:Key="scanMenuBackgroundDark">#262626</Color>
+    <Color x:Key="groupHeaderLabelLight">#807F84</Color>
+    <Color x:Key="groupHeaderLabelDark">#9998A0</Color>
+    <Color x:Key="groupHeaderBackgroundLight">#F1F1F6</Color>
+    <Color x:Key="groupHeaderBackgroundDark">#1C1C1E</Color>
     <Color x:Key="scanMenuTitleLight">#C8C8C8</Color>
     <Color x:Key="scanMenuTitleDark">#9E9F13</Color>
     <Color x:Key="scanMenuDividerLight">#C8C8C8</Color>
diff --git a/sources/PocketBook/Resources/Styles/Styles.xaml b/sources/PocketBook/Resources/Styles/Styles.xaml
index 224cc67..c9d73b5 100644
--- a/sources/PocketBook/Resources/Styles/Styles.xaml
+++ b/sources/PocketBook/Resources/Styles/Styles.xaml
@@ -13,6 +13,25 @@
         <Setter Property="SelectedIndicatorColor" Value="{AppThemeBinding Light={StaticResource Gray950}, Dark={StaticResource Gray100}}"/>
     </Style>
 
+    <Style TargetType="Label" x:Key="groupHeaderLabel">
+        <Setter Property="TextColor" Value="{AppThemeBinding Light={StaticResource groupHeaderLabelLight}, Dark={StaticResource groupHeaderLabelDark}}"/>
+        <Setter Property="FontFamily" Value="Pro-Display-Semibold"/>
+        <Setter Property="FontAttributes" Value="Bold"/>
+        <Setter Property="VerticalOptions" Value="Center"/>
+        <Setter Property="Margin" Value="16,0"/>
+        <Setter Property="FontSize" Value="14"/>
+    </Style>
+
+
+    <DataTemplate x:Key="groupHeaderTemplate">
+        <Grid BackgroundColor="{AppThemeBinding Light={StaticResource groupHeaderBackgroundLight}, Dark={StaticResource groupHeaderBackgroundDark}}"
+                HorizontalOptions="Fill"
+                RowDefinitions="30">
+            <Label Text="{Binding Key}" Style="{StaticResource groupHeaderLabel}"/>
+        </Grid>
+    </DataTemplate>
+
+
     <Style TargetType="Border" x:Key="BorderStyle">
         <Setter Property="Stroke" Value="{AppThemeBinding Light={StaticResource Gray200}, Dark={StaticResource Gray500}}" />
         <Setter Property="StrokeShape" Value="Rectangle"/>
diff --git a/sources/ViewModel/BookVM.cs b/sources/ViewModel/BookVM.cs
index 0fa4554..ed1e425 100644
--- a/sources/ViewModel/BookVM.cs
+++ b/sources/ViewModel/BookVM.cs
@@ -12,12 +12,36 @@ namespace ViewModel
 			set =>SetProperty(Model.Title,value,v=>Model.Title=v);
 		}
 
+        public int Nbpages
+        {
+            get => Model.NbPages;
+            set => SetProperty(Model.NbPages, value, v => Model.NbPages = v);
+        }
+
+        public Languages Language
+        {
+            get => Model.Language;
+            set => SetProperty(Model.Language, value, v => Model.Language = v);
+        }
+
+        public string Id
+        {
+            get => Model.Id;
+            set => SetProperty(Model.Id, value, v => Model.Id = v);
+        }
+
         public string Image
         {
             get => Model.ImageLarge;
             set { }
         }
 
+        public string ISBN
+        {
+            get => Model.ISBN13;
+            set => SetProperty(Model.ISBN13, value, v => Model.ISBN13 = v);
+        }
+
         public Status BookStatus
         {
             get => Model.Status;
@@ -27,6 +51,15 @@ namespace ViewModel
             }
         }
 
+        public List<string> BookPublishers
+        {
+            get => Model.Publishers;
+            set
+            {
+                SetProperty(Model.Publishers, value, v => Model.Publishers = v);
+            }
+        }
+
         public List<Author> BookAuthors
         {
             get => Model.Authors;
@@ -38,18 +71,22 @@ namespace ViewModel
 
         public string BookFirstAuthor { get; private set; }
 
-        public BookVM(Book book)
+        public string BookFirstPublisher { get; private set; }
+
+
+        public BookVM(Book book): base(book)
         {
-            Model = book;
-            Title = book.Title;
-            BookStatus = book.Status;
-            BookAuthors = book.Authors;
-            Image = book.ImageLarge;
             if (BookAuthors.Count() > 0)
             {
                 BookFirstAuthor = BookAuthors.First().Name;
             }
-            else BookFirstAuthor = "Unknow";
+            else BookFirstAuthor = "Unknown";
+
+            if (BookPublishers.Count() > 0)
+            {
+                BookFirstPublisher = BookPublishers.First();
+            }
+            else BookFirstPublisher = "Unknown";
         }
     }
 }
diff --git a/sources/ViewModel/ManagerVM.cs b/sources/ViewModel/ManagerVM.cs
index 5bcfba7..128fee3 100644
--- a/sources/ViewModel/ManagerVM.cs
+++ b/sources/ViewModel/ManagerVM.cs
@@ -12,13 +12,23 @@ public class ManagerVM : BaseViewModel<Manager>
 
     public RelayCommand<string> LoadBooks { get; private set; }
 
+    public IEnumerable<IGrouping<string, BookVM>> GroupedBooks => Books.GroupBy(b => b.BookFirstAuthor).OrderBy(group => group.Key);
+
+    public BookVM SelectedBook
+    {
+        get => selectedBook;
+        set => SetProperty(ref selectedBook, value);
+    }
+
+    private BookVM selectedBook;
+
     public ManagerVM(ILibraryManager libraryManager,IUserLibraryManager userLibraryManager)
     :this(new Manager(libraryManager,userLibraryManager))
     {}
 
     public async void LoadBooksFromManager()
     {
-        var result = await Model.GetBooksFromCollection(index, 10, "");
+        var result = await Model.GetBooksFromCollection(index, 40, "");
         NbBook = (int)result.count;
         books.Clear();
 
@@ -28,9 +38,14 @@ public class ManagerVM : BaseViewModel<Manager>
         }
     }
 
+    public async void LoadBookFromManager(string id)
+    {
+        var result = await Model.GetBookById(id);
+        SelectedBook = new BookVM(result);
+    }
+
     public ManagerVM(Manager model) : base(model)
     {
-        Model = model;
         LoadBooks = new RelayCommand<string>(o => LoadBooksFromManager());
         LoadBooks.Execute();
         Books = new ReadOnlyObservableCollection<BookVM>(books);