The Devil's Keeper was published by Alias in 2005.

An order of Chinese monks has the power to trap demons in virtually inescapable crystal prisons, but their efforts are thwarted by an especially powerful demon called Chi Tao. His war against the monks limits their numbers and forces them to go underground, passing down the secret of their power only from father to son. Now, only one living master remains and his son has been killed, so he has taken three students under his tutelage to teach them the art of trapping demons.