Prison Officer Jim Dalton is used to walking the landings on the male side of Her Majesty's Prison Peterborough. It's a dangerous place, fuelled by testosterone-driven violence, but he's done the job for a long time. He understands the unwritten rules, and he has the prisoners' respect.

When a relative is sent to the jail, Dalton is transferred to the female side of the prison. His next shift is so easy, he can't believe that the officers over there get paid the same wages. He sleeps well for the first time in years.

But when he is assigned to the young offenders' wing, dealing with female prisoners no longer seems so simple. As every day passes, and he gets to know the women better, he is slowly drawn in to new traps and a new nightmare. One which could destroy everything.

Taking a break from his bestselling DI Barton series, Ross Greenwood returns with this shocking, page-turning and utterly compelling glimpse behind the bars of a women's prison. From a man who walked the landings himself...