crea un metodo simple y sencillo en la clase catalogo que permita eliminar un libro por nombre, isbn y titulo

public void DeleteBook(int id)
        {
            //select all books from catalog
            var books = _catalog.Books;
            int index = 0;
            bool found = false;
            //Iterate all books
            foreach (var book in books)
            {
                //if book id and id param are equals
                if (book.Id == id)
                {
                    //set index position
                    index = books.IndexOf(book);
                    found = true;
                    break;
                }
            }

            if (found)
            {
                //remove book
                _catalog.Books.RemoveAt(index);
            }
        }