Provides scientific evidence to show how habits, attitudes, emotions and even kindness spread rapidly outwards from person to person through personal contact. This title helps you learn: how infants feel their mothers' emotions; and how more than 25 per cent of your happiness is due to the happiness of your friends.

Dr David Hamilton worked in the pharmaceutical industry for four years after gaining his PhD. Now a bestselling author, he travels throughout the world, offering workshops to help people understand the power of the mind on the body.www.drdavidhamilton