Dr Shahed Yousaf spends his time running between emergencies - from overdoses to assaults, from cell fires to suicides - with one hand perpetually hovering over the panic button. Being a prison doctor is not for the faint-hearted. An outsider on the inside, in this book he introduces us to a cast of unforgettable characters, including killers, con men and auto-cannibals. To Dr Yousaf, they are patients first and prisoners second - because any one of us could end up on the wrong side of the law. Dedicated to caring for people on the margins of society, he tells us honestly and compassionately what it's like to be their doctor in a system that's chronically overcrowded, drastically under-resourced and all too easy to ignore. But while the system is failing, he and his colleagues are doing their very best to prop it up.