The authoritative word on Ant, a hot open source build tool for Java.

Lead author Alan Williamson holds the highly-visible position of editor-in-chief of Java Developer's Journal and brings with him four leading Ant aficionados.
As an open source tool, Ant is readily available and cost-effective for Java developers to try and use, but only sparse documentation currently exists.
As part of the book, the authors are building an Ant tool library to donate back to the Apache Ant project, thereby tying the book content to the core Ant developers.