I've read:
Adam Sexton - Rap on Rap
Benjamin Meadows Ingram and Brad "Scarface" Jordan - Diary of a Madman: The Geto Boys, Life, Death, and the Roots of Southern Rap
Brian Cross - It's Not About a Salary
Bruce Williams - Rollin' With Dre, The Unauthorized Account
Chuck D - Fight the Power
Curtis "50 Cent" Jackson - From Pieces to Weight
Delacorta - The Rap Factor
DMX & Smokey D. Fontaine - E.A.R.L., The Autobiography of DMX
Emmanuel Jal - War Child
Ernie Paniccioli & Kevin Powel - Who Shot Ya? Three Decades of Hip-Hop Photography
Ice T - The Ice Opinion
Ice T and Douglas Century - Ice
Kool Moe Dee - There's a God on the Mic
Luther Campbell & John R. Miller - As Nasty As They Wanna Be
Prodigy with Laura Checkoway - My Infamous Life
Ronin Ro - Have Gun Will Travel
Ronin Ro - Raising Hell: The Reign, Ruin, and Redemption of Run-D.M.C. and Jam Master Jay
Stacy Gueraseva - Def Jam, Inc.: Russell Simmons, Rick Rubin, and the Extraordinary Story of the World's Most Influential Hip-Hop Label