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.

Halt, Will, and Horace set out for Hibernia, where a quasi-religious group, the Outsiders, is sowing confusion and sedition, and they find that secrets from Halt's past may hold the key to restoring order before the last kingdom is undermined.

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

The ancient god has been resurrected and sealed inside Beru's body, but both of them are at the mercy of the Prophet Pallas, who wants to subjugate the Six Prophetic Cities; but the god grows stronger and far away Anton is learning to harness his powers as a Prophet, and planning to lead Jude, Hassan, and Beru's sister Ephyra on a desperate quest to destroy the god, Pallas, and save the world from darkness--even if it requires an unbearable sacrifice....

Twelve-year-old Mia McKenna and her family live in perpetual night in the town of Nubis, and when a mysterious cult storms her hometown and captures all the umbra tamers and their mystical, powerful creatures made of shadow and starlight, Mia and her brother, Lucas, are the city's only hope of survival. Twelve-year-old Mia McKenna has grown up in the darkness. It's all she's ever known, and she finds comfort in it. Like nearly all the cities in the...

Gabry lives a quiet life in a town trapped between a forest and the ocean, hemmed in by the dead who hunger for the living, but her mother Mary's secrets, a cult of religious zealots who worship the dead, and a stranger from the forest who seems to know Gabry threaten to destroy her world.