Dr Abbie Maroño is a leading behavioural scientist and advisor to the US Secret Service. Abbie's new book, 'The Upper Hand', demonstrates how to influence people and situations in our favour with skill and integrity—ethically and without relying on leverage or coercion. Based on principles of prosocial engineering, Abbie explores how to build and sustain trust by understanding the psychological mechanisms behind human decision-making. She shares the essential truths about the complexity of human behaviour, giving you the upper hand in any situation.