Isabel Devane finds her fate irrevocably entwined with a boy whose secrets are more dangerous than most.

When Corinna Evans' mother is sent to prison, Corinna has nowhere else to go so she moves back in with her father and his family. Determined to make it through these last few months of school, she only wants to keep a low profile and get by but someone keeps getting in her way. Tyler Flynn has been best friends with Corinna's brother forever and she's never liked him. What happens when her feelings start to change? And will her family ever forgive her for her past?

Seventeen-year-old April Parker wakes up in an underground facility, a shock bracelet on her wrist and a five-day countdown on the clock. Dozens of other teens share her inexplicable fate, but their unseen captors never intervene no matter how brutal conditions become. When the ruthless - and unnervingly magnetic - Marcus seizes control, April's trauma-forged instinct is to lay low. But protecting her friends drives her to bargain with the boy she should fear most - a boy whose reality fractures with every tick. Then the countdown ends, and the real terror begins. Powers ignite. Alliances shatter. And predators are born. And with a saboteur among them determined to keep the doors closed forever, escaping what comes next may be the only way to survive it.