This book describes historical crop circles and discusses the debate whether crop circles are merely man-made hoaxes or artwork, whether they come from aliens or from human thoughts, or whether they were created by Earth's energy or plasma vortices.
General Note
Includes chronology.
Includes glossary.
Content Note
Mysterious discoveries - Early sightings - Complicated designs - Alien creations - Other explanations - Scientific investigation - Forgers come forward - Cereal art - Crop circles today.