"I once told you, Cameron-Strange, that there is a tipping point. Stay this side of it, and the failsafe mechanisms apply. Cross it, and the past is irrevocable."

James Calum Campbell was born in Glasgow. He read Medicine at Edinburgh, and practised in Papua New Guin­ea, Queensland, and Auckland, where he was Clinical Head of the busiest emergency department in Australasia. He now divides his time between Scotland and New Zealand. He won the Impress Prize for New Writers in 2014.