 Potentialife now operates in twelve countries and, because of the innovative way in which it tracks behavioural change data, is allowing businesses and researchers alike to see the impact of positive psychology first-hand.He is the author of the international best sellers Happier and Being Happy, which have been translated into 25 languages.He has also written two children’s books in collaboration with Shirly Yuval-Yair in Hebrew; one about Helen Keller and the other about Thomas Edison.