This is hands down the best AngularJS book I've read and one I'd definitely recommend for people new to AngularJS or those with more experience.
It references a really recent version of AngularJS (1.2.19) and talked about some features I really wasn't aware of. The style of the code is also consistent with Todd Motto's Opinionated AngularJS styleguide for teams , so this is a book that really reflects a lot of current AngularJS best practices.
This book is written by the same authors of the original O'Reilly AngularJS book, but this book fills in a lot of gaps left in that book. I thought it was a nice touch to have a separate chapter on testing for controllers, services and directives right after they are introduced. That makes more sense to me than just having a huge chapter on testing stuck at the end of the book.
I highly recommend this book to anyone doing (or interested in doing) AngularJS development.