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A boy is reunited with his long-lost father, the Greek god Pan, only to find himself taken to the kingdom of the gods. What begins as just another ordinary day for Demon ends up being far from normal .

Eagle is the only one who can soothe the three-tongued serpent who guards the spring of eternal youth at the source of the River Styx - and Psyche needs 'just a little jug' of water from it to erase Aphrodite's (non-existent) wrinkles and win the chance of marrying her son, Eros.

But nothing Demon does has any effect, and Asgard is a strange place - he must contend with Fafnir the ice dragon, ravenous and dangerous Fenrir the wolf and, worst of all, the treacherous trickster god Loki, who is determined to cause mischief.

. Artemis, goddess of the hunt, has a unicorn emergency - something is sickening her wonderful wild herd, and if Demon, Official Beastkeeper to Olympus, can't save them, they'll become extinct.