struct ContentView: View {
   @Environment(ApplicationData.self) private var appData

   var body: some View {
      NavigationStack {
         List(appData.userData) { book in
            CellBook(book: book)
         }
         .listStyle(.plain)
         .navigationTitle(Text("Books"))
         .navigationSubtitle("My List of Books")
         .toolbarTitleDisplayMode(.inlineLarge)
      }
   }
}