All 21 volumes form a coherent and pleasant work to read and reread. Accessible soon as you correctly read, without necessary decryption, realistic, this fiction is nevertheless reflect a certain time by enrolling in the tradition of 'The Phantom, Akim, and other Tounga Tarzan' that fall course different registers ... The originality of Rahan, it is to be a full-fledged character of Prehistory that starting in pursuit of the Sun met his fellow "Those who walk upright" and helps them grow. We follow him from his childhood (Childhood Rahan t. 1), adolescence (The youth of Rahan t. 2) to adulthood (Rahan now has just over 40 years, it is born February 24, 1969), always with the same thirst for knowledge and truth, but the authors (Jean-François Lécureux took over from his father) will they have the courage to do it old? Finally Rahan is a Humanist early.