The One (The One-Hundred #5)

All Ones are evil.

Cressa-la seems to be an exception... until the incident. The return of the darkness that hunted her four years ago has only made it worse. There's a new enemy on the horizon, and she's worse than anything Damian could have been.
With her powers spiraling out of control and her body breaking down at a molecular level, can Cressa-la fend of what's trying to steal her heart, or will she succumb to the darkness suffocating her?