I have come to expect that any book written by Mark Christiansen will be nothing but excellent, and this book does not disappoint. Although it is not the type of book that I would generally not read from cover to cover, I like to use it as a constant reference when using After Effects CS6, Highly recommended!
There are not that many books that cover the higher end stuff, so this book is a very welcomed edition. The book covers a lot of useful techniques and even dips into a bit of SpeedGrade. If you know a bit of After Effects and want to know a lot more, then this is the book you need to get.