Not for the novice

This is something as unusual as a Plone book that describes the leading edge (aka Plone 3) in technical detail. It takes us on a development journey, where all new functionality of Plone 3 is described in painstaking detail. But be wary, this book assumes that you know Plone beforehand (as a Power user or a developer), that you are proficient in the programming language Python, that you are comfortable with Object Orientation concepts (knowing a bit of Java or C++ beforehand is recommended) and that you have no problem grokking XML as a natural habit!

IF you fulfill these requirements, this is a good book. OK, it doesn't exactly explain WHY some things are done differently in Plone 3 or WHY the added complexity is necessary (or desirable), but you are assumed to surmise these details anyway, as you already know the issues (as per your background).

In short, if you don't fulfill the requirements: don't buy this book. If you do and are interested in how to develop stuff the Plone way: this is absolutely the book for you!