Cut Glass: Jewels - Ruby eBook

Cutler and David are reunited, and this time they will fight anyone who tries to separate them again. But when someone steals shards of defeated jewels, word is that an underground faction is trying to re-grow the deadly entities from those pieces. Cutler and David are assigned to help recover those shards before that can be accomplished. Because if they fail, the number of jewels will increase to where the delicate balance between lapies and demons will be compromised.

After which the wholesale slaughter of mankind will be imminent.