Gideon Biddle: Night Shadows (Hardcover‪)‬

In the darkness of night, a frightening new enemy has emerged to threaten the safety of the two worlds. Gideon Biddle, the boy who can walk through shadows, returns to the magical world of the Midlands in order to save Griffin Nightshadow from his Drack mentor Ign Creech. Facing the dangers of wild magic, Gideon must delve into the past of Griffin and Zephren Raginall in order to stop the terrifying Ambient Army from conquering the Midlands once and for all.