‘A stunner! Without a doubt, one of the best crime novels of the year!’ - No.1 international bestseller Jeffery Deaver on The Last Girl to Die

To beat them, she’ll have to join them…

On a locked ward in the world’s highest-security prison hospital for the criminally insane, a nurse has been murdered and her newborn baby kidnapped. A ransom must be paid, and the clock is ticking.

Forensic profiler Dr Connie Woolwine is renowned for her ability to get inside the mind of a murderer. Now she must go deep undercover among the most deranged and dangerous men on earth, and use her unique skills to find the baby - before it’s too late.

She has five days to catch the killer.

But with the walls of The Institution closing in on her, will her sanity last that long?

A claustrophobic, haunting crime thriller that will keep you up at night, perfect for those who couldn’t put down The Sanitorium and The Hunting Party

Readers cannot get enough of Helen Fields!

‘Fantastic. Excellent. Incredible. I could not put this one down for the life of me.’

‘What rollercoaster ride this was. I love it when a book shocks me the way this did.’

‘Breathtaking. Twists and turns galore. I couldn’t put it down, I loved it.’

‘A tense, twisty, phenomenal read!’

‘Haunting. Breathtaking shocks, horror, unforeseen twists, and an emotionally shattering conclusion.’

‘Twisty, unpredictable and kept me guessing the whole time.’

‘Breathtakingly brilliant… The ending left me stunned.’

‘Remote, forbidding, atmospheric, tinged with superstitions and folkloric rituals…A gripping read.