Ever since Amelia woke up in the hospital, recovering from a near-death fall she has no memory of, she's been suspicious. Her friends, family, and doctors insist it was an accident, but Amelia is sure she remembers being pushed. Then another girl is found nearby — one who fell, but didn't survive. Amelia's fears suddenly feel very real, and with the help of her new boyfriend, Liam, she tries to investigate her own horrific ordeal. But what is she looking for, exactly? And how can she tell who's trustworthy, and who might be — must be — lying to her?The closer Amelia gets to the truth, the more terrifying her once orderly, safe world becomes. She's determined to know what happened, but if she doesn't act fast, her next accident might be her last.

Watch your step.Eliza knows the legends about the swamp near her house — that people have fallen into sinkholes, never to be seen again, maybe even falling to the center of the earth. As an aspiring geologist, she knows the last part is impossible. But when her best friends drag her onto the uneven ground anyway, Eliza knows to be worried. And when the earth opens under her feet, there isn't even time to say I told you so.As she scrambles through one cave, which leads to another, and another, Eliza finds herself in an impossible world — where a small group of people survive underground, running from vicious creatures, eating giant bugs, and creating their own subterranean society. Eliza is grateful to be alive, but this isn't home. Is she willing to risk everything to get back to the surface?

Mailee and Cara take care of each other. Mailee is the star of the high school plays; Cara is the stage manager. Mailee can't keep her life together; Cara has enough organizational skills for the both of them.So when the girls are invited to visit the Haven, a commune in the mountains near their suburban Montana homes, it seems like an adventure. Until Cara starts spending every waking minute there ... and Mailee thinks it's creepy, almost like a cult. When Cara decides she's going to move to the Haven permanently, Mailee knows it's a bad idea. But how far will she go to save her best friend ... from herself?