Chris and Liz have survived the trials of the Praegressus Project, but that was just the beginning. The vile experiments have altered their physiology - granting them superhuman strength and speed. Oh, and wings. Now, lost in the Californian mountains, they must master their newfound abilities and find a way back to civilisation. But they are not alone in the wilderness. In the chaos of their escape, the Chead were also freed. Barely human and deadly, they stalk the darkness, hunting... The second book in The Praegressus Project series by New York Times and USA Today Bestselling author Aaron Hodges.