Lean UX is an excellent guide to practical and validated Product Design. It brings together a range of techniques and processes, we all already use, into a friendly and coherent process. Not only are the methods proven and easy to apply, Jeff and Josh show how to manage up to ensure the success of applied Lean UX.
I bought this for my girlfriend. For the product quality, it was a speckles new copy, nicely packaged and delivered. As for the content, my girlfriend (a web, UI/UX designer) says it is a very good read.