Just in case someone should be interested: I found that today e-book of the “Free Learning - Free Technology eBooks” campaign at the Packt website is my “Blender 2.6 Cycles: Materials and Textures Cookbook”; it’s enough to create a free account to download it for free.
Although related to the 2.6 Blender release, could still be useful for someone (and, in case someone is wondering: I don’t get an Euro from this).
Enrico, thank you very much! I’ve browsed through the book and I have to say that I am thoroughly impressed. Must read, I hope that newer versions will sell well.