Nothing emphasizes the need for good cardio so much as being tracked by two goddesses of the hunt and their hounds. Having barely escaped from Mount Olympus and blocked from shifting planes, Atticus, Granuaile, and Oberon must run across Europe in hopes of an assist from a friend of the Tuatha Dé Danann. They’re going to need plenty of help, since Artemis and Diana and other Olympians really want them dead.

The ancient leader of the world’s vampires will take a shot at them too if he can, because Druids are able to unbind vampires on sight and he can’t abide such a threat to their undead existence. But there’s another threat on the horizon: Loki, the Norse god of mischief, is convinced that Atticus’s continued existence is the only thing preventing him from unleashing Ragnarok upon the world, so he’d like Atticus to be discontinued as soon as possible. Now an already fraught run looks like a gauntlet of mortal peril.

The Druids and their wolfhound will need to outwit the Olympians together and somehow neutralize Loki if they want to survive—and still have a world to survive in.