In particular, the work with the 32-bit float mode and HDR is described in detail, optimizing keying Working with Keylight, rotoscoping and tracking.
The examples are taken from practice, no wonder, as Mark Christiansen has among other things worked on "The Day After Tomorrow" (yes, many works were made with effect AFX).
Overall, the book is aimed at the ambitious advanced wants to reach a new level, and professionals can learn quite a bit more. Beginners are likely to be overwhelmed because of the English terms and the higher entry levels, a view might be worth yet.