static void Main(string[] args)
{
var spec1 = new ShortbookSpecification();
var spec2 = new AuthorSpecification("Author1");
using (var ctx = new BookContext())
{
var repository = new AudioBookRepository(ctx);
var spec2Converted = FilterConverter.ConvertSpecification <Book, AudioBook>(spec2);
var results = repository.List(spec2Converted);
}
}