I listened to the audiobook of Shatner Rules, by William Shatner. I bought it without any idea if I'd like it. I've never read anything by him before. I was pleasantly surprised and I enjoyed it a lot. Shatner reads the audiobook and that helps.
While only partly biographical, and a bit self-promotional (in a humorous way), it's mostly full of funny stories and other humorous remarks. I learned a few useless things, like the phrase "Beam me up Scotty." was never used in the original Star Trek series. And if you yell that toward him in public, he's likely to flip you off.