"A comprehensive investigation of encounters with unidentified flying objects, all the more riveting because it is both skeptical and scrupulously objective." -Kirkus Reviews

For over fifty years, the modern UFO controversy has raged between believers and debunkers, with little input from the scientific community. Now, in a major report commissioned by Laurance S. Rockefeller, an international panel of scientists grills UFO investigators and debates the physical evidence of dozens of cases, including:

• Paris, 1984: Military radar confirms reports of a gigantic disc, more than half a mile in diameter
• Ohio, 1978: An Army Reserve helicopter's flight-control system is disrupted by an unknown cylindrical object
• Southern France, 1981: Scientists find soil and vegetation evidence at the location of a reported UFO landing
• Texas, 1980: Witnesses to a large flaming object suffer radiation-type injuries

Featuring a focused, sober assessment by a distinguished scientific panel, here is a challenging-and disturbing-inquiry into one of the new century's greatest mysteries ...

"An important contribution to a popular field infested with misinformation, misunderstandings, and tripe." -John Alexander, PhD, National Institute for Discovery Science

"A powerful statement about the nature of the UFO mystery." -UFO Magazine

"Many readers will come away from this book convinced that there are genuine questions still to be answered." -Asimov's Science Fiction Magazine

"Informative reading ... a hoard of raw information, and some admirably cautious reasoning, from which any reader who already cares about UFOs might be glad to learn." -Publishers Weekly