Tomcat Books
Apache Jakarta-Tomcat, by James Goodwill, Apress, ISBN: 1893115364
Tomcat Kick Start, by M. Bond & D. Law, SAMS, ISBN: 0672324393
Tomcat: The Definitive Guide, Second Edition, by Jason Brittain & Ian F. Darwin, O'Reilly Press, ISBN: 0596101066
Professional Apache Tomcat 5, by Vivek Chopra, Amit Bakore, Jon Eaves, Ben Galbraith, Sing Li, and Chanoch Wiggers, Wrox Press, ISBN: 0764559028
Tomcat 5 Unleashed, by Lajos Moczar, Sams, ISBN: 0672326361
Pro Jakarta Tomcat 5, by Matthew Moodie, Apress, ISBN: 1590593316
How Tomcat Works, by Budi Kurniawan, Paul Deck, Brainysoftware.Com, ISBN: 097521280X; there is also a Home Page for this book
Mastering Tomcat Development, by Peter Harrison, Ian McFarland, Wiley, ISBN: 0471237647
Apache Tomcat Bible, by Jon Eaves, Warner Godfrey, and Rupert Jones, Wiley, ISBN: 0764526065