The Collected Inventions of Nathan Coppedge: Perpetual Motion, Standard-, Applied-, Flying-

This is the official collected volume of Nathan Coppedge's amazing and (so far) prolific career as an inventor. It even includes recent inventions such as designs for flying machines, and of course quite a few designs for perpetual motion. This extensive and authoritative text straight from the author includes full arguments in defense of each and every of Nathan's many machines, as well as where possible, diagrams and other interesting information.