public void AuthorSelected(Author author)
		{
			if (author == null)
				return;

			DeviceServices.Current.Navigate(new AuthorViewModel()
				{
					Author = author
				});
		}
		internal static IEnumerable<Book> LoadBooksByAuthor(Author author)
        {
            var result = _connection.Table<Book>().Where(s => s.Author == author.Name).ToArray();
            return result;
        }