I'm running through this myself. Up to Chapter 11 so far, but it is a great book to both learn on and reference. Fair warning, it's a well sought after book. I think my Amazon order was "backordered" a few times before I canceled and paid the "in-store tax".

One great thing with this book is that the foot-notes reference the changes needed to get everything to play nice with 2.3 (the book was written for 2.2).