This book may be the first of its kind in both the Arabic and foreign libraries, as it delves into a rare subject that many shy away from due to the need for extensive knowledge in the history and science of monotheistic religions and their roots. The Mandaean religion is still shrouded in much mystery and ambiguity, so what if the subject is "mythology," which seeks to explain, analyze, and interpret Mandaean myths, which are the first threshold to Gnosticism and monotheism? This book will, for a very long time, be unique in its subject matter and will provide readers and researchers with the true keys to understanding the Mandaean religion and exploring its depths, far from the superficial books written about it. It places Mandaean myths within a comprehensive cosmic cycle that begins with creation, then civilization, then destruction, and ends with death and annihilation, thereby establishing a connection between the subject of myths and the time of their occurrence. Despite the author's prolific output in the field of mythology and the history and science of religions, this book seems to us to be the most important among his works due to its extreme scientific rigor, accuracy, objectivity, the rarity of its subject, and its captivating style.