This book, unique in its kind in Greek literature, presents the most important secret societies in the world. Through its pages, their philosophy, structure, and invisible action are detected, with which each one, in its own way, sealed the history of humanity: Knights Templar - Cathars - Rosicrucians - Freemasons - Pythagoreans - Assassins - Illuminati - Temple of Zion - Golden Dawn - OTO, etc.