I bought this book in the middle of a rather difficult implementation, and was more surprised than positive. The book is always divided into two parts closer to a subject area. Foundations and "Deep Dive". Perfect, because that is something for everyone and even creating your own extensions will be discussed. Especially good I liked it, that not only at MSBuild Final, but TFS build is treated with its peculiarities.
The bottom line: Absolute buy recommendation for anyone who has to do with Builds!