No coercion operator error with Linq query with Select new

I'm using UWP, Sqlite and Linq to make ObservableCollections to bind to my XAML Listviews. No problems thus far. Next I like to have the results of a join query into a List, also to bind to a Listview. This results in an error even with the simplified code below:

    public class BooksAndSeries
    {
        public int PublYear { get; set; }
        public string SeriesName { get; set; }
        public string Title { get; set; }
    }
    public static List<BooksAndSeries> SelBooksSeries { get; set; }
    public static void LoadSearchedBooks()
    {
        using (CatDataContext catDB = new myBooks.Model.CatDataContext())
        {
            var SearchedBooks = from Book bb in catDB.Books
                                select new BooksAndSeries { PublYear = bb.PublYear, Title = bb.Title };
            SelBooksSeries = new List<BooksAndSeries>(SearchedBooks);
        }
    }        

The query gives the error: System.InvalidOperationException HResult=0x80131509 Message=No coercion operator is defined between types 'myBooks.GenModule+BooksAndSeries' and 'myBooks.Model.Book'. Source= StackTrace:

I'm using the latest Microsoft VS Community edition and Microsoft.EntityFrameworkCore.Sqlite 1.1.5.