David Eagleman is a neuroscientist at Baylor College of Medicine, where he directs the Laboratory for Perception and Actions as well as the Initiative on Neuroscience and Law. His scientific research is published in journals from Science to Nature, and his neuroscience books include: Live-Wired: The Shapeshifting Plasticity of the Brain; Wednesday Is Indigo Blue: Discovering the Brain of Synesthesia; and Incognito: The Secret Lives of the Brain (Canongate 2011). He is also the author of an internationally bestselling book of fiction, Sum: Tales from the Afterlives (Canongate 2009).