Being a mechanic is hard work. Mercy Thompson, for instance, just spent the last couple of months trying to evade the murderous queen of the local vampire seethe, and now the leader of the werewolf pack - who's maybe-more-than-just-a-friend - has asked for her help. A book of fae secrets has come to light and they're all about to find out how implacable - and dangerous - the fae can be. OK, so maybe her troubles have nothing to do with the job. But she sure could use a holiday.