diff --git a/src/BookApp/AppShell.xaml b/src/BookApp/AppShell.xaml
index fb3d58b..a07b727 100644
--- a/src/BookApp/AppShell.xaml
+++ b/src/BookApp/AppShell.xaml
@@ -8,7 +8,7 @@
-
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@@ -26,7 +26,7 @@
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diff --git a/src/BookApp/MainPage.xaml b/src/BookApp/MainPage.xaml
index 53d6fa2..b0ad555 100644
--- a/src/BookApp/MainPage.xaml
+++ b/src/BookApp/MainPage.xaml
@@ -106,6 +106,7 @@
+
diff --git a/src/BookApp/Pages/DetailBook.xaml b/src/BookApp/Pages/DetailBook.xaml
index 72b8dff..99a8f49 100644
--- a/src/BookApp/Pages/DetailBook.xaml
+++ b/src/BookApp/Pages/DetailBook.xaml
@@ -1,111 +1,127 @@
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\ No newline at end of file
diff --git a/src/BookApp/Pages/Tous.xaml b/src/BookApp/Pages/Tous.xaml
index dad0dc2..5fa122c 100644
--- a/src/BookApp/Pages/Tous.xaml
+++ b/src/BookApp/Pages/Tous.xaml
@@ -25,7 +25,7 @@
-
+
diff --git a/src/BookApp/Resources/Images/arrow_up_arrow_down.svg b/src/BookApp/Resources/Images/arrow_up_arrow_down.svg
new file mode 100644
index 0000000..65d5982
--- /dev/null
+++ b/src/BookApp/Resources/Images/arrow_up_arrow_down.svg
@@ -0,0 +1,4 @@
+