Petar Tahchiev is the lead author for this Second Edition. He's a softwareengineer with Hewlett Packard and serves as the Jakarta Cactus lead developer. He is a leader of the Bulgarian Java User Group (BGJUG) and a frequent speaker at many conferences. He currently lives in Amsterdam.
Felipe Leme lives in California and has worked as a software engineer with Java since 1996. He is a four-time repeat speaker at JavaOne, has written dozens of Java-related articles, and contributed to many open source projects including DbUnit and Jakarta Cactus.
In addition to being an active member of the Maven development team, Vincent Massol is the creator of the Jakarta Cactus framework. After having spent four years as a technical architect on several major projects (mostly J2EE), Vincent is now the co-founder and CTO of Pivolis, a company specializing in applying agile methodologies to offshore software development. He lives in the City of Light, Paris, France.