Jython Books
1. Jython Essentials. Samuele Pedroni, Noel Rappin. O'Reilly and Associates. 2002.
2."Jython for Java Programmers." Robert Bill. New Riders. 2001.
3. Python Programming with the Java Class Libraries: A Tutorial for Building Web and Enterprise Applications. Richard Hightower. Addison-Wesley Publishing. 2002.
4. An Introduction to Computing and Programming in Python: A Multimedia Approach. Mark Guzdial. Prentice Hall. 2004.
5. WebSphere Application Server Administration Using Jython Robert A. Gibson, Arthur Kevin McGrath, Noel J. Bergman. IBM Press. 2009.
6. Scientific Data Analysis using Jython scripting and Java S.V.Chekanov, 2010 (Springer, 2010, 440 p. ISBN 978-1-84996-286-5)
7. The Definitive Guide to Jython (Open Source Version) Josh Juneau, Jim Baker, Victor Ng, Leo Soto, Frank Wierzbicki, 2009/2010
Books 1, 2, 3, and 7 are available from Safari.
For a detailed list of books and articles look at:
Ed Taekema has compiled a fine list: Jython Bibliography
Building an Application Web Service based on Jython Scripts
Jython Articles
1. Scripting from scratch: Creating a Jython administrative script for IBM WebSphere Application Server - 07 Apr 2010, by Bob Gibson (primary author of "WebSphere Application Server Administration Using Jython" - see above).
Jython Tutorials
1. First and second part of a very good tutorial written by Barry Feigenbaum, IBM (download needs registration).
Other Resources
In the back of Learning Python is a very cool Jython graphing example.