For a longer introduction to JBoss, see
JBoss: A Developer's Notebook
. (O'Reilly, 2005. Norman Richards, Sam Griffith).
For general EJB instruction, with thorough JBoss coverage, see
Enterprise JavaBeans, 4th Edition
. (O'Reilly, 2004. Richard Monson-Haeful, Bill Burke, Sacha Labourey)
To learn more about Hibernate, see
Java Persistence With Hibernate
. (Manning, 2007. Christian Bauer, Gavin King)
For complete coverage of the JBoss Seam framework, we recommend
JBoss Seam: Simplicity And Power Beyond Java EE
. (Prentice Hall, 2007. Michael Yuan, Thomas Heute).