Devi Sridhar is a writer, broadcaster and world-leading expert in public health and wellbeing. She is Professor and Chair of Global Public Health at the University of Edinburgh and has advised the WHO, UNICEF, UNESCO and the Scottish, UK and German governments. Devi appears regularly on ITV and Channel 4 News, has a weekly column in the Guardian, tweets to over 300,000 followers, and recently became a certified Level 3 Personal Trainer. Her first book, Preventable, was a BBC Radio 4 Book of the Week and a Sunday Times bestseller.