Erik Hatcher, an Ant project committer, has written popular articles on Ant's JUnit integration. He maintains jGuru's Ant FAQ where he answers the world's toughest Ant questions. Erik lives in Charlottesville, Virginia.
Otis Gospodnetic is a coauthor of the first edition of Lucene in Action. He has been involved with Lucene since 2000 and is also an active member of Apache Solr, Nutch, and Mahout development teams, as well as Lucene Project Management Committee. Otis is a founder of Sematext, a software development and consulting company focused on Lucene, Solr, Nutch, and Hadoop.
Michael McCandless has been building search engines for over a decade. In 1999 he founded iPhrase, a startup providing enterprise search software written in Python and C. When IBM acquired iPhrase in 2005, he became interested to Lucene and started contributing patches, becoming a committer in 2006 and a PMC member.