This is a good introduction to Zope 3. I've been reading it off and on since I started working on Launchpad, which uses Zope. The book was good for helping me get the terms and conventions of Zope development, but Launchpad has a very particular use of Zope 3. Some of the more general web dev uses of Zope 3 covered in the book don't apply, for that reason.But still, this is a good overview of web development using Zope 3. I would recommend the book if you're trying to get up to speed with Zope.