Dreamfall Series by Amy Plum

Cata Cordova suffers from such debilitating insomnia that she agreed to take part in an experimental new procedure. She thought things couldn’t get any worse...but she was terribly wrong.Soon after the experiment begins, there’s a malfunction with the lab equipment, and Cata and six other teen patients are plunged into a shared dreamworld with no memory of how they got there... moreCata Cordova suffers from such debilitating insomnia that she agreed to take part in an experimental new procedure. She thought things couldn’t get any worse...but she was terribly wrong.Soon after the experiment begins, there’s a malfunction with the lab equipment, and Cata and six other teen patients are plunged into a shared dreamworld with no memory of how they got there. Even worse, they come to the chilling realization that they are trapped in a place where their worst nightmares have come to life. Hunted by creatures from their darkest imaginations and tormented by secrets they’d rather keep buried, Cata and the others will be forced to band together to face their biggest fears. And if they can’t find a way to defeat their dreams, they will never wake up. less

For most people, nightmares always come to an end. But for Cata, Ant, and the others, there may be no escape from theirs. After an experimental treatment meant to cure their insomnia went horribly wrong, the teens were dragged into a shared dreamworld where their most terrifying fears became reality.The six of them have no way of waking up. And they’re beginning to realize that if they die here, they might actually die in the real world... moreFor most people, nightmares always come to an end. But for Cata, Ant, and the others, there may be no escape from theirs. After an experimental treatment meant to cure their insomnia went horribly wrong, the teens were dragged into a shared dreamworld where their most terrifying fears became reality.The six of them have no way of waking up. And they’re beginning to realize that if they die here, they might actually die in the real world. One of the dreamers is already gone, and anyone could be next. The only thing they know for certain is that they have to work together to survive. But as they learn the truth about one another’s pasts, they soon discover they are trapped with something far worse than their nightmares…. less