public IQueryable <Book> filterbooks(IQueryable <Book> books, string searchstring, string author, string publisher)
{
var titlesearch = new TitleSearch();
books = titlesearch.Result(books, searchstring);
var authorsearch = new AuthorSearch();
books = authorsearch.Result(books, author);
var publishersearch = new PublisherSearch();
books = publishersearch.Result(books, publisher);
return(books);
}
