Aztec- and Carribean-influenced cultures conflict on an Earth-like colonised world that's desperately trying to claw its way back up the technology ladder after a minor apocalypse. The mix of cultures is a difficult one to pull off convincingly, but Buckell does a great job here with plausible, sympathetic characters on both sides. The series continues; I'll follow it.
ISBN 0765350904. Search for this book on Wikipedia or isbn.nu.