The book contains a collection of the best projects presented at the "Social Marketing for One Health" competition launched by the Italian Social Marketing Association to celebrate 20 years of activity.?The book opens with the introductions of the honorary committee Philip Kotler, Jeff French, François Lagarde, then one by one the 17 selected projects are presented with theirposters and accompanying description. In closing, the President of the Association that supported the competition: Roberto Romizi President of ISDE (International Society of Doctors for the Environment).?