using System;

using System.Collections.Generic;

public class Program

{

    public class Book

    {

        public string Title;

        public string Description;

        public string Author;

        public string Genre;

        public int Barcode;

        public int Price;

        public int Year;

        public int AmountOfBooks;

    }

    public static void Main ()

    {

        var stock = new List <Book> {

            new Book {Title = "Hello", Author = "Andrew"},

                new Book {Title = "Go", Author = "Mary"}};

        Console.WriteLine("Please enter the name of author.");

        string author_s = Console.ReadLine();

            foreach (Book element in stock ) 

                if(element.Author == author_s) {Console.WriteLine(element.Title);}//поиск по автору

    }

}