A word of warning, though. People with experience on the ZODB will most likely find the material and tone are way too entry-level to be useful for them. That is because the audience that we will try to reach with part one of the book are Python developers in general. We assume no knowledge of the ZODB, not even of its existence.
If you look at the book outline, you'll see that the book is divided in three parts. The first part is this beginners guide, while the second part will contain much more detailed and advanced information. So, what I'm saying is, please be patient. I'll try to get going something from the second part for the next update.