Evolve or die ...Don't miss the final part of this breathtaking new trilogy from multi award-winning author Teri Terry. Shay has followed Xander and joined his mysterious scientific cult at their remote Scottish compound. She's desperately searching for Callie, who went missing before the start of the epidemic that kills 95% of cases, and leaves a tiny number of survivors with astonishing new powers.Can Shay uncover the truth about the origins of the epidemic, find Callie and perhaps even rekindle her relationship with Kai? Or will Xander's grand plans destroy them all for ever?