The Lone Brit on 13: A Prisoner's Hell in Spain's Toughest Jail

Better to be Feared: Jail Life in the Raw

El Infierno: Drugs, Gangs, Riots and Murder: My time inside Ecuador’s toughest prisons

In the Shadow of Papillon: Seven Years of Hell in Venezuela's Prison System

Getting Life: An Innocent Man's 25-Year Journey from Prison to Peace

The Hate Factory: Thirty Years Inside with the UK's Most Notorious Villains

Inside: Life Behind Bars in America

Banged Up!: Doing Time in Britain's Toughest Jails

Texas Death Row

Maximum Security

Killing Time: Surviving Dubai's Most Notorious Prisons

Monkey House Blues: A Shanghai Prison Memoir

The Damage Done: Twelve Years Of Hell In A Bangkok Prison

The Cocaine Diaries: A Venezuelan Prison Nightmare

Orange Is the New Black: My Year in a Women's Prison

Banged Up Abroad: Hellhole: Our Fight to Survive South America's Deadliest Jail

Borstal Boy

Traitors of the Tower

The Hot House: Life Inside Leavenworth Prison

Public Executions: From Ancient Rome to the Present Day