PocketBook/src/BookApp/ViewModel/TousViewModel.cs

using BookApp.Data;
using BookApp.Model;
using System.Collections.ObjectModel;

namespace BookApp.ViewModel
{
    public class TousViewModel
    {
        public ObservableCollection<Book> BookCollection { get; set; } =
            new ObservableCollection<Book>();

        public TousViewModel()
        {
            Stub stub = new Stub();
            BookCollection = stub.GetStubData();
        }
    }
}