O’Reilly has announced the release of “Java Data Objects” (US$39.95), co-authored by David Jordan and Craig Russell. Java Data Objects (JDO) allows Java developers to manage data without any specialized knowledge of the underlying database software or database query languages, according to O’Reilly. This book “provides a thorough introduction to JDO, starting with a simple application that demonstrates many of JDO’s capabilities. The authors introduce JDO’s interfaces, discuss class enhancement and JDO’s optional features, and familiarize readers with JDO architectures. The next part of the book deals with object modeling, schema design, and aspects of the JDO development process.”