The case for more transparent scientific study of these phenomena is well done, and it is timely, as the US government appears to be releasing previously closed records and NASA appears to be beginning just the type of study the book proposes. * Choice * Robert Powell is one of the luminaries of the UFO world, an accomplished scientist who brings rational, objective analysis to a complex subject where the evidence is all too often peremptorily dismissed by dedicated skeptics or naively accepted without proper analysis by true believers. Even-handed, methodical, and insightful, Roberts new book will help the educated reader to understand and interpret the best current evidence regarding one of the worlds greatest and most portentous mysteries. -- Chris Mellon, Former Deputy Assistant Secretary of Defense for Intelligence. The first comprehensive stock-taking of the UFO problem, both scientific and big picture, since the Pentagons about-face in 2021 confirming the existence of UAP and their potential threat to national security. Sober, reliable, and refreshingly free of conspiracies, Powells book is in the great tradition of Sturrocks The UFO Enigma (1999) and Hyneks The UFO Experience (1972). Clear prose and a logical structure make it an outstanding introduction to the field. -- Alexander Wendt, Professor of Political Science, The Ohio State University Robert Powell clearly explains the role that science must play in furthering universal understanding about UFOs. Scientists must claim this investigation as their own, and balance the national security narrative that has become so dominant. What facts do scientists already know about this phenomenon and how can they go about studying it in the future? I found the information in UFOs to be educational, though-provoking and inspiring. -- Leslie Kean, author of UFOs: Generals, Pilots and Government Officials Go on the Record