Our book (see my signature below) covers CruiseControl, Anthill, Gump, and plain cron/AT automation of builds.
As for Maven - its fair that their book doesn't cover it as there isn't even an official 1.0 release of it yet. Although I'm sure you will soon see several books discuss it and use it.
Originally posted by Gavin Bong:
I just took a peek at the book's TOC on amazon. There was nothing on CI. I'd rate CI on the same level as TDD. Thus i'd expect some coverage on tools like cruisecontrol or maven.
g