Gustav Gloom and the Castle of Fear 6 Author:Adam-Troy Castro Gustav and Fernie continue their journey through Dark Country in this new title! — In the final installment of Adam-Troy Castro's creepy Gustav Gloom series, the fate of the Dark Country rests on Gustav and Fernie's shoulders. After weeks of traveling on a quest to find their fathers, Fernie and Gustav finally come face-to-face with their nemesi... more »s?the evil Lord Obsidian. Filled with heroic action sequences, terrifying chills, and plenty of humor, this final book will keep fans on the edge of their seats.« less