David Geary, who worked at Sun Microsystems from 1994 through 1997, was a member of the JSF 1.0 Expert Group. He is president of Clarity Training Inc., a training and consulting company focusing on server-side Java technology, and is the author of eight books on Java technology, including the best-selling Graphic Java (TM) 2 series, Advanced JavaServer Pages, and Google (TM) Web Toolkit Solutions (all from Prentice Hall). David was also a member of the JSTL Expert Group, was the Second Apache Struts committer, and wrote questions for Sun's Web Developer Certification Exam. David is a regular speaker on the popular No Fluff Just Stuff tour and is a JavaOne Rock Star, by virtue of his Shale Presentation with Craig McClanahan in 2005.
Cay S. Horstmann is a professor of computer science at San Jose State University. He has served as vice president and chief technology officer of Preview Systems Inc., and as a consultant on C++, Java, and Internet programming for major corporations, universities, and organizations. Cay is also the author of the classic Core Java (TM) books.