Like someone else said, you can learn MODx by finding resources on the internet. I started reading this book to get introduced to the system, and it was OK for that, but I found I didn't really use it or need it when I actually started making my MODx site. It's a good overview/introduction that may help you understand what MODx is and how it functions, but not totally needed if you just want to jump right in and make a site with MODx. Also, since the release of MODx 1.0/1.0.1, the terminology used in this book is no longer correct, so it may actually confuse you (Resources are now Elements, Documents are now Resources, etc.) And I found some of the writing to be awkward.