bind data to a datagridview from some different tables in a sql express dataBase that are connected together using foreignKeys

Hi everyone

i have DataBase ( SQL Express ) that include some tables like:

Author Table { AuthorID , AuthorName , ... }   (Primary Key = AuthorID)

Book Table { BookID , BookTitle , AuthorID , ... }   (Foreign Key = AuthorID)

i use "LINQ to SQL Classes" so i can use the tables like objects ... so ... in the object "Book" there is an extra property called "Author" (Because Of that Foreign Key),

so i can use this code to get data to show on the forms :

Label1.Text=Book.Author.AuthorName;

i wanna add a DataGridView to the form and add "Book Table" as a DataSource to it with the columns { Book Title , Author }

but  the AuthorName Column is empty , because i cant  do :

dataGridView1.Columns[1].DataPropertyName="Author.AuthorName";

another way i tried was:

BooksDataContext BookDB=new BooksDataContext;
var data=From d in BookDB.Book
         select d;
foreach (var v in data)
{
   dataGridView1.Rows.Add(v.BookTitle,v.Author.AuthorName);
}

it works, but what if some changes happen to the DataBase ???

i need to run the code above again but it will add all the books again, and .....

i tried doing the  "Linda Liu's" Suggestion =>  http://blogs.msdn.com/b/msdnts/archive/2007/01/19/how-to-bind-a-datagridview-column-to-a-second-level-property-of-a-data-source.aspx

 but  i didn't understand it and it didn't work ....

Any Idea ???????