Hi,
i am new to jboss app server 4.0.3 .please tell me some good books to refer and study
Here are a few:
JBoss at Work: http://www.jbossatwork.com/
JBoss, A Developer's Notebook: http://www.oreilly.com/catalog/jbossadn/
The Getting Started Guide: http://docs.jboss.org/jbossas/getting_started/v5/html/
The online docs: http://labs.jboss.com/jbossas/docs