David Abrahams

Well, it is very interesting, but I estimate I understood like one third of it.

In contrast to the book by Alexandrescu, this book provides a more structured approach to template-metaprogramming. I mainly describes the boost::MPL. The exercises were interesting and also demanding. Also, part of the idioms described here became part of the standard which underscores the importance of the presented material.

Unfortunately, I found the chapters about DSL's not self-contained and thus barely understandable.

Type-based (template) metaprogramming is one of the most powerful programming technologies available. Its also highly mind-expanding. If you're a true geek and you have a strong background in C++ this is for you. Otherwise, forget it!