Marc Loy is a senior programmer at Galileo Systems, LLC, but his day job seems to be teaching Java and Perl to various companies -- including Sun Microsystems. He has played with Java since the alpha days and can't find his way back to C. He is developing an interactive learning application at Galileo written entirely in Java. He received his master's degree in computer science at the University of Wisconsin-Madison, and still lives in Madison with his partner, Ron Becker. He does find time to relax by playing the piano and/or throwing darts, depending on how successful the day of teaching or programming was. Robert Eckstein, an editor at O'Reilly, works mostly on Java books (notably Java Swing) and is also Responsible for the XML Pocket Reference and Webmaster in a Nutshell, 2nd Edition. In his spare time he has been known to provide online coverage for popular conferences. He also writes articles for JavaWorld magazine. Robert holds bachelor's degrees in computer science and communications from Trinity University. In the past, he has worked for the USAA insurance company and more recently spent four years with Motorola's cellular software division. David Wood is Technical Director of Plugged In Software in Brisbane, Australia, where he works with a wonderful team producing Java custom software. In his eclectic career he has been a ship's navigator, deep sea salvage engineer, and aerospace project manager for the U.S. Navy, and consulted to Lawrence Livermore National Laboratory and Netscape. David enjoys hiking and sailing with his very patient wife and teaching his son Perl before he goes to kindergarten. David holds degrees in mechanical, electrical, aeronautical, and astronautical engineering from the U.S. Naval Postgraduate School and the Virginia Military Institute. James Elliott is a senior software engineer at Berbee, with over ten years professional experience as a systems developer. He started designing with objects well before work environments made it convenient, and has a passion for building high-quality Java tools and frameworks to simplify the tasks of other developers. Brian Cole has been working with Java since its early days and teaches the language at venues ranging from Sun Microsystems to public high school. He has a BA from Oberlin College and an M.S. from the University of Wisconsin-Madison.