Jim Hines has done it again, and then some. This book, as other reviewers have said, is a send-up of all the stereotypical creatures of fantasy, from angry trees to 2HP kobolds. In-jokes abound for fans of fantasy and gaming alike, well balanced with heaps of action, drama, and the tale of the battling powers that drive the plot.
If you enjoyed Jig's previous adventures, you'll enjoy this one at least as much. If you haven't, it's going to be easy to pick up on what's happened previously. The story in this novel is captivating, and the jokes will keep you laughing, from the gentle to the pointed.
The thing about these novels, though, is the magic the author works in making us care about the wretched of the earth. Goblins, orcs, and kobolds are the nameless walk-ons of fantasy, whose typical role is to die. Here they find some measure of nobility, and we get to see their own special brand of courage as they fight everything from arrogant, racist (specist?) humans to great powers. If you've ever been bullied or pushed around in any way, you'll enjoy the story of Jig, Relka, Gratz, and all the rest.