In stark contrast to the associations that the word awakens in the mind of a Western person, in the Muslim world, Djinn are believed to be ancient, powerful, and dangerous beings with ambiguous dispositions towards humanity. The beliefs and mythology surrounding them have proven so resilient that the Quran, the most sacred book of the Islamic religion, was compelled to accept their existence and refer to them no less than twenty-nine times in total—much like how Christian tradition was forced to accept the existence of the evil eye and recognize pre-Christian practices of exorcisms. Their presence has influenced not only Islamic occultism but also many Western esoteric schools, leaving a deep imprint on the realm of literature and the art of the Fantastic, as well as in that strange world that today stretches between imagination and reality, namely the realm of Magic. The book you hold in your hands aspires to serve as a guide that will introduce you to these strange beings, their history and nature, as well as the way they have influenced and continue to influence the evolution of humanity.