The Manual of Free Energy Devices and Systems (Volume II)– 1986 by D.A. Kelly
Compiler and Editor, Donald Kelly, describes the viability of each "Free Energy" device from Nikola Tesla to present. Also metnioned are the various spin-off inventions as a result of "free energy" research. This book includes copies of patents, diagrams, illustrations and notes of the many people involved in free-energy research. Many photographs and illustrations are included.