I just picked up the printed book of The Thrilling Adventures of Lovelace and Babbage, and so far it's regularly hilarious, especially the footnotes. Sample (from end-note 16, p. 38):
Some may wonder—was there anything romantic between [Lovelace and Babbage]? There's a good reason to think that there was, and that reason is, it's extremely fun to think about. Sadly that's the only reason, as there isn't a hint of romance in any of their correspondence with each other, and they weren't exactly the subtlest people in the world.