Originally published in Great Britain in 2014 by Penguin.
Summary:
Two people are abducted, imprisoned, and left with a gun. As hunger and thirst set in, only one walks away alive. It's a game more twisted than any Detective Helen Grace has ever seen. If she hadn't spoken with the shattered survivors herself, she almost wouldn't believe them. Helen is familiar with the dark sides of human nature, including her own, but this casewith its seemingly random victimshas her baffled. But as more people go missing, nothing will be more terrifying than when it all starts making sense....
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