This book presents an overview of field propulsion systems for the use of space travel and interstellar travel. Such systems include warp drive, space drive and gravity-control schemes, and are propelled receiving the propulsive force derived from an interaction of the spacecraft with external fields. Spacecraft is propelled against space-time structure. This cannot be achieved by the conventional methods like chemical propulsion and electric propulsion. The book should be a valuable source of information for researchers interested in spaceflight and propulsion physics.