Based on the fantasy bestseller. To save humanity from the Gryphon's claws, outcast Mark must confront his family's dark legacy and enter a deadly battle in the parallel world of the Black T... Read allBased on the fantasy bestseller. To save humanity from the Gryphon's claws, outcast Mark must confront his family's dark legacy and enter a deadly battle in the parallel world of the Black Tower.Based on the fantasy bestseller. To save humanity from the Gryphon's claws, outcast Mark must confront his family's dark legacy and enter a deadly battle in the parallel world of the Black Tower.