Prof Guy Leschziner is a neurologist at Guy’s and St Thomas’ Hospitals, where he leads the internationally renowned Sleep Disorders Centre, one of the largest sleep services in Europe, and is Professor of Neurology and Sleep Medicine at King’s College London. Alongside his clinical work, he is the presenter of two series on clinical neuroscience on BBC Radio 4 and BBC World Service - Mysteries of Sleep and The Senses - and author of The Nocturnal Brain: Nightmares, Neuroscience and The Secret World of Sleep. He is also editor of the forthcoming Oxford Specialist Handbook of Sleep Medicine (OUP), and is neurology section editor for Principles and Practice of Sleep Medicine (Elsevier).