Summon the Keeper

Summon the Keeper by Tanya Huff is one of the fantasy books to which I keep returning. Enough so the edges are getting a little bit worn. The idea is simple enough - some people are born to help keep the supernatural and natural worlds separated, but a fun plot of how to close the hole to hell that's in the basement along with werewolves, vampires and retired gods wandering by makes for a fun read.