Immense and complex geometric formations that appear in the middle of the fields of wheat, oats or barley, the crop circles, or crop circles, continue to arouse great curiosity. The author of this work tries to shed light on this unusual phenomenon and presents us with the most famous documented cases (from the circle discovered in the Drende region - in the Netherlands, in 1590 - to the most recent cases of recent years). In addition, it analyzes the secondary and collateral effects of crop circles on plants, machines, animals or humans, and lists the different hypotheses that seek to elucidate these unusual appearances (from the most elaborate scientific versions to the most unexpected supernatural explanations ). Baudouin presents crop circles as one of the most fascinating adventures of our time with which he hints, beyond our usual concepts, a dimension that may, in the near future, unite sacred geometry with the genetic code, the ancient symbolism and universal mathematical constants, giving another meaning to our existence and our perception of the universe. Bernard Baudouin is a writer and has spent years studying currents of thought. He has written numerous articles and works on spirituality and religions. In Editorial De Vecchi he has published The Beings of Light, The Keys of Intuition and The Great Book of the Dalai Lamas.