Sixteen-year-old Nina continues her fight to save her sister and, ultimately, humanity by joining forces with rogue exorcists.

Phears, an evil ghost, wants eleven-year-old Max to help him capture the ghosts of two children whose parents once trapped him, and he sends a Berserker Ghoul to possess Max and convince him to obey.

When Wolf is taken by the Soul-Eaters, Torak must infiltrate their clan to bring him back.

"Harper is dealing with too many new changes in her house. Her cousin, Leo, is now living with them; her sister, Kelly, has started working at a local makeup store, Jeune; and Harper's spirit hunter abilities have grown increasingly more powerful and uncontrollable, making her a target for possession. But when Harper and Dayo uncover a dangerous plot to steal youth from millions of innocent people, Harper must use all her powers to destroy an ancient...

6,000 years in the past, twelve-year-old Tarak and his guide, a wolf cub, set out on a dangerous journey to fulfill an oath the boy made to his dying father--to travel to the Mountain of the World Spirit seeking a way to destroy a demon-possessed bear that threatens all the clans.

When 15-year-old Wulliam's father is possessed by a dark spirit, Wull must care for him and take on his family's mantle of Riverkeep, tending the Danek. Wull finds out there is a cure for his father's illness, and embarks on an epic journey to kill the great sea-dwelling beast known as the mormorach.-- Provided by publisher.