I'm looking forward to reading this book, Marshall "Eddie" Conway's Marshall Law: The Life and Times of a Baltimore Black Panther (AK Press, 2011).
My favorite autobiography by a (former) Black Panther is James Carr's BAD: The Autobiography of James Carr (Herman Graf Associates, 1975), reprinted by AK Press 2002. Not to be confused with the singer by the same name, although he's good too. This book is rambunctious and highly poignant, not only reflecting and exposing the conflicted historical logic of the Black Panther Party and its members, but expressing the basic fact and crux of being, the inexorable sine qua non of rage, resistance, and uncertain renewal.
Recently, his first novel T.H.U.G. L.I.F.E. (Grove Press, 2009) was published.