Dan Jolley

Gabe and his friends are challenged to use the powers of the five elements to destroy Arcadia and prevent a sinister cult from tearing down the barrier between the worlds.

After accidentally merging San Francisco with the shadow dimension of Arcadia, Gabe and his friends risk the ultimate sacrifice to unite all five elements.

Finding an old map, Gabe and his friends follow clues to a secret chamber beneath San Francisco, where they perform what they think is a friendship ritual before strange events reveal a sinister cult from a parallel realm.

"Set just after the events of Omen of the Stars, WindClan warrior Crowfeather must conquer the ghosts of his past to make way for his Clan's future. When a terrible threat rises within WindClan's territory, it heightens tensions that are already growing in the wake of the battle with the Dark Forest. Crowfeather is caught between his son, Breezepelt, and their Clanmates, but with the Clan in danger, the time for doubt is over"--