Introduction to the Zope Object Database, by Jim Fulton: — Goes into much greater detail, explaining advanced uses of the ZODB and how it’s actually implemented. A definitive reference, and highly recommended. —

Persistent Programing with ZODB, by Jeremy Hylton and Barry Warsaw: — Slides for a tutorial presented at the 10th Python conference. Covers much of the same ground as this guide, with more details in some areas and less in others. —