I just finished 'An Astronaut's Guide to Life' by Chris Hadfield.
It's not really a guide to life, it's about his own approach to his own life, and why that has worked. It's a good read, and he's a likeable man, which helps. The most interesting bits are the about what it's actually live in space, and the preparation and background work for that. It certainly made me reflect on my own approach to my professional life, and there are things I've taken on board from his approach.
It's not unputdownable, but I'm really glad I read it.