.NET Fiddle

CSharp · Console

/Program.cs

using System;
using System.Collections.Generic;

public class Program
{	
	public static void Main()
	{
		List<string> Titles = new List<string>(new string[] { "title1", "title2", "title3" });
		List<Book> Books = new List<Book>(Titles.Count);
		for (int i = 0; i < Titles.Count; i++)
		{
			Books.Add(new Book(Titles[i], string.Empty));
		}
		
		Console.WriteLine(Books[0].Title);
	}
}

public class Book
{
	private string mTitle;
	public string Title { get { return mTitle; } }
	
	private string mAuthor;
	public string Author { get { return mAuthor; } }
	
	public Book(string _title, string _author)
	{
		this.mTitle = _title;
		this.mAuthor = _author;
	}
}