Written by the founder of the First International Symposium on Beamed Energy Propulsion, this book explains the fundamental physics behind the emerging field of laser propulsion. This type of propulsion, which needs no engine or traditional fuel, will become an integral part of space development in the first quarter of this century. Comprehensively addressing the technology for the first time, the author includes in-depth discussions of the physics phenomena behind laser propulsion, such as plasma dynamics, ablative laser propulsion, propagation and reception of light, and more. At the cutting edge of this new technology, this text combines reviews of current research papers and projections for the future.