Crop circles. What are they? What makes them? Why are they here? They appear mostly under cover of darkness, complex designs mysteriously imprinted on fields of ripened grain. Except for eighty eyewitnesses, nobody knows how they got there or why. They leave the plants undamaged. They contain mathematical theorems. They encode secret geometry. They portray ancient symbols. Since the 1890s some 10,000 crop circles have appeared beside ancient sacred sites in Britain and 25 other countries. And the patterns are getting more intricate. Governments set up agents to tell us they're hoaxes but the scientific evidence firmly contradicts this view. What on earth is going on? Bestselling author Freddy Silva lived among this phenomenon in southern England, an area that hosted 90% of the world's crop circles. In his international bestseller, since published in four languages, he takes us on an exhilarating firsthand field trip into the heart of the mystery and behind the scenes of the enigma, introducing us to farmers, researchers, scientists, mystics, hoaxers and debunkers. He tells: ¿ how to distinguish genuine from man-made ¿ what the magnetic field anomalies mean ¿ how sound, light and gravity are involved ¿ how they are made ¿ what the symbols might be telling us Deeply informative and copiously illustrated, Secrets In The Fields remains the most authoritative book on crop circles, even after 20 years in print. This special 20th anniversary edition includes a synopsis of what has taken place since 2003.