private static void Main(string[] args) { var authorService = new AuthorService(); var publisherService = new PublisherService(); var titleService = new TitleService(); var isbn = "123456789"; var author = authorService.LookUpAuthor(isbn); var publisher = publisherService.LookUpPublisher(isbn); var title = titleService.LookUpTitle(isbn); Console.WriteLine($"Information for the book with the isbn {isbn}"); Console.WriteLine("------------------------------------------------"); Console.WriteLine($"The author is: {author}"); Console.WriteLine($"The title is: {title}"); Console.WriteLine($"The publisher is {publisher}"); Console.ReadKey(); }