'Deliciously dark and utterly compelling – I couldn't put it down.' – CLARE MACKINTOSH They're locked up for your safety. Now, you're locked in with them. How do you find a murderer in a prison full of killers? On a locked ward in the world's highest-security prison hospital, a scream shatters the night. A nurse has been murdered and her daughter has been taken. And with only five days to find the girl, the clock is ticking for Dr Connie Woolwine to find a killer hiding in plain sight... Welcome to The Institution. The locked room thriller readers don't want to leave. 'This is the best book I've read in years!' ⭐⭐⭐⭐⭐ 'I don't think I have ever read anything that gripped me quite so intensely.' ⭐⭐⭐⭐⭐ 'An absolutely mind-blowing suspense thriller.' ⭐⭐⭐⭐⭐ 'Terrifyingly brilliant. An absolute must-read.' ⭐⭐⭐⭐⭐ 'A book that evolves at break-neck speed, taking the reader on a spine-chilling journey.' ⭐⭐⭐⭐⭐ 'If this book isn't a smash hit I'll claw my own eyes out!' ⭐⭐⭐⭐⭐ 'Tense, exciting, heart-thumping action' ⭐⭐⭐⭐⭐ 'Deliciously creepy, unflinching and addictive.' ⭐⭐⭐⭐⭐ 'A first-class locked room thriller.' ⭐⭐⭐⭐⭐ 'Gobsmackingly good!' ⭐⭐⭐⭐⭐ 'Helen Fields' talent for creating atmospheric thrillers knows no bounds.' ⭐⭐⭐⭐⭐ 'A real page-turner; what a ride straight from the outset. I felt physically chilled.' ⭐⭐⭐⭐⭐ 'Chilling, claustrophobic and packed with twists and turns.' ⭐⭐⭐⭐⭐ 'Original and innovative...a crackingly scary thriller.' ⭐⭐⭐⭐⭐ 'Dark, atmospheric, creepy and hauntingly good. Kept me guessing until the end – I loved it.' ⭐⭐⭐⭐⭐ 'Amazing is all I can say – I loved it!' ⭐⭐⭐⭐⭐