After Dr. John Dee tries to take the Codex from Nicholas Flamel, Josh, who was working at the bookshop Flamel owned, rips the 2 pages of the Codex, and goes with Flamel along with Sophie. They stay with Scathach until they are forced to flee to Hekate. When Sophie's aura is awakened by Hekate, there is no time for Josh's aura to also be awakened as an invading army led by Bastet, the Morrigan and Dr. John Dee freeze and shatter the world tree, Yggdrasil. Eventually, in Paris, Flamel gives him Clarent, the Sword of Fire, for him to use to protect himself. With it, he slays Nidhogg and sees its memories. He also contains strategic knowledge of Mars since he was awakened by the Sleeping God in the Catacombs of Paris soon after slaying Nidhogg. Josh later learns the Magic of Water from the Kin