Introduction to Object-Oriented Databases by Roberto Zicari · Published September 1, 1998 · Updated February 16, 2014 Steve Hand and Jane Chandler Very visual introduction to ODBMS. DOWNLOAD (PDF)
DOMINO: Moving Objects Databases January 1, 2005 by Roberto Zicari · Published January 1, 2005 · Last modified February 18, 2014
Accelerating Application Development with Objects September 1, 2010 by Roberto Zicari · Published September 1, 2010 · Last modified February 16, 2014
Simple Object Persistence with the db4o Object Database December 1, 2004 by Roberto Zicari · Published December 1, 2004 · Last modified February 18, 2014