After discovering the yams of Reunion Island, François Maugis embarks on a surprising journey through time and space to unravel the mysteries of this extraordinary food plant. Besides the vernacular names in more than 25 countries, we will find in this brochure, some recipes and above all, the fantastic hypothesis put forward by the author: The yam would be the true "forbidden fruit" that which, by giving it access to knowledge , brought man out of his animal condition.