The three lives of GARA, in its first and second parts, recalls periods of the past; Because its hero Gara, who traveled in the time, recalls in the instant of his agony the memory of the deep past, starting from the eleventh century in which he was born, and passing through the twentieth century, which he faced fleeing towards the future, thanks to the Green One (al-Khadir) who guards the sea of time and who transports him from the past to the future to show him what humankind will become. I inserted the ancient tradition into the science fiction novel, through Greek philosophy and tragedy and through the Mauritanian folk music tradition. The Mauritanian novelist Moussa Ould Ebnou is one of the most innovative writers in African literature today, as well as one of the most neglected. He is the author of several novels in both French and Arabic, in which he masterfully weaves together science fiction and mysticism, history and myth, truth and fiction, philosophy and literature.