I know i'm a lil late in posting this but the biography (not autobio) of Cat Power is out called you guessed it, Cat Power, A Good Woman. Its by Elizabeth Goodman a writer for Blender (are they still around??) and Rolling Stone Magazine.
I picked it up a while back but couldn't get around to reading it as I had my finals so just recently started up this book and I must say it's an incredibly interesting read.
here's the cover, and even though i'm not done with it yet i'd recommend it to any fan