Shadow Worlds, Book Two, Unusual Allies

As their story continues, Billy, Kory, Belinda, Cathy and Uncle Jack find themselves now trapped in the world of ancient Irish mythology. They must convince those there to help them outwit Loki and Gullveig, who have now managed to get the sorceress Morrigan on their side. Can a talking stuffed owl and gnomes who get mistaken for leprechauns be of help