Circular Evidence: A Detailed Investigation of the Flattened Swirled Crops Phenomenon

This is the granddaddy of all crop circle books. Lots of pictures. Lots of first hand reporting. Short on speculation. The authors were in southern England, got interested, and started driving around to the crop circles that were appearing in fields near them. They took photos. They measured. They made sketches of how the plants were flattened. They talked to the farmers whose fields they had to trespass upon to do this work. After ten years of this, in 1988 they decided to publish what they'd seen in a book. It sold hundreds of thousands of copies, and made crop circles a household word. For an introduction to the subject, this book is still an excellent choice. Though flawed by the limited geographic coverage, the strong emphasis on factual reporting, adequate prose, and plentiful pictures make this book a winner.

I loved this book. Anyone who wants to see great pix of crop circles, this is as far as you need to go.