Foreverland is Dead by Tony Bertauski

 Six teenage girls wake with no memories. One of them is in a brick mansion, her blonde hair as shiny as her shoes. The others are in a cabin, their names tagged to the inside of their pants. Their heads, shaved. Slashes mark the cabin wall like someone has been counting.

Hundreds of them.

There’s wilderness all around and one dead adult. The girls discover her body rotting somewhere in the trees. As the weeks pass, they band together to survive the cold, wondering where they are and how they got there. And why.

When an old man arrives with a teenage boy, the girls learn of a faraway island called Foreverland where dreams come true and anything is possible. But Foreverland is dead. In order to escape the wilderness, they’ll have to understand where they are.

More importantly, who they are
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Girls, waking up not knowing who they are, having no past. Learning early that they have been implanted with a device that knocks them unconscious if they wander to far from the hut. Fighting for clothes, and food with the heavy feeling of a never ending struggle to survive. But Miranda is different, she explores the high tech, well stocked house. But without knowing how long they are stuck here, can she risk sharing and how much?

Foreverland is Dead takes a darker turn pretty fast. The stink of rotting flesh and struggling just to live through the day. Its pretty obvious from the beginning there is a leader, calling all the shots. She is not about to let anybody show her up, and she'll fight to maintain her power over the other girls. 

First in the series The Annihilation of Foreverland we saw a group of boys struggling with their lives, but now it's the girls turn. Each book can be read as a stand alone or any order. They are dark, with twists you won't see coming and engaging characters you want to see win in the end. 

The story is very powerful and suspenseful. At times keeping the reader on the edge of their seat to see if the girls will make it out of danger, alive. It's dark and incredibly imaginative, violent and creepy. PG-16