"The Lean Startup" (Ries, 2011)
An overhyped, really hard to finish book that goes on and on and on for pages and chapters reiterating the same thing once and once and once again.
Probably it could have been condensed down to 10% of what it is.
Maybe it'll interest you if you're in the 'start up scene' and can't have enough of the same blabber. I personally could have done with a bullet point list of the main concepts (pivoting, A/B tests, learning, etc), which besides, have been talked about so much in the tech scene, that they seemed old and established practices by the time I read them in the book.