Death of WCW was fantastic.
I only had a short time to read Terry Funk's book in the store, so I skipped about halfway through to the point where Funk goes to Japan. It's nothing great, but some of it is quite interesting, with some tidbits that I'd never heard about scattered throughout.
I scanned through Jimmy Hart's book from 1993-on, and found it pretty boring. He doesn't badmouth anyone, and generalizes everything. There were no stories about the wrestlers he managed in WCW, the backstage atmosphere, etc.