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.