Oracle JDevelper10g for Forms & PL/SQL Developers by Peter Koletzke & Duncan 
Mills (McGraw-Hill, 2006)

You can find the accompanying downloads, code listings, and errata for this book at 
www.tuhra.com. The Ultimate Human Resources Application, TUHRA, is the sample 
application that is used throughout the book as a  worked example. It represents a typical  
database-backed OLTP system and covers many of the common use cases encountered 
by application developers. The complete TUHRA application, along with chapter by 
chapter workspace images are available from the downloads page.