This is Leonard G. Cramp's amazing book UFOs & Anti-Gravity - Piece for a Jig Saw (1997) which is a reprint of 1966 classic book on flying saucer propulsion and suppressed technology. Long out-of-print, UFOs & Anti-Gravity is a highly illustrated and technical look at the UFO phenomena by a trained scientist. Cramp first introduces the idea of 'anti-gravity' and introduces us to the various theories of gravitation. He then examines the technology necessary to build a flying saucer and examines in great detail the technical aspects of such a craft. Cramp's book is a wealth of material and diagrams on flying saucers, anti-gravity, suppressed technology, G-flelds and UFOs. Chapters include Crossroads of Aerodynamics, Aerodynamic Saucers, Limitations of Rocketry, Gravitation and the Ether, Gravitational Spaceships, G. Field Lift Effects, The Bi-Field Theory, VTOL and Hovercraft. Analysis of UFO photos and claims, plus more. This book puts speculation back in the box! Within it you will find plenty of photographs and results from dozens of carefully executed scientific experiments in the field of anti-gravity. Find out how do UFOs do what they do and what's it like to fly one? 390 pages, many pictures. A must read for everyone.