In the sequel, "The Arctic Incident", the 13-year-old Artemis learns that his father was only injured in the attack on his shipping vessel, and is being held hostage by the Russian Mafia. Artemis barters with the People to receive their aid in rescuing his father in exchange for assisting them in solving the mystery of who was behind a goblin rebellion. It is later revealed that Opal Koboi, a pixie criminal mastermind, and ex-LEP officer Briar Cudgeon are behind the plot. Their plan is thwarted, ending in Cudgeon's death and Koboi's arrest, and Artemis successfully recovers his father.