Ill mention that I'm not invading anyone's privacy here, these men add fan's of their books and use these pages to keep in touch with their fanbase along with their own friends/family.
Kenji Gallo, has inspirational facebook statuses early every single morning. Its actually great to read, you can tell he lives a very disciplined life.
http://www.facebook.com/Kenji.BreakshotFrank Calabrese Jr.
Very nice man, will answer questions, appreciates the fans of his book (which I recommend, a great story of an odd father/son dynamic)
http://www.facebook.com/profile.php?id=100002094609307Louis Ferrante
Not very active, but if you've read his book or heard his Gotti rap song which he made to try and avoid prison, you'll want to add him
http://www.facebook.com/profile.php?id=100000427677074Joaquin Garcia (famous mob busting FBI Agent)
Loves to post funny pictures on his wall, sometimes with political commentary.
http://www.facebook.com/profile.php?id=100000452405585