CBET Exam Secrets Study Guide, used, book only. Does not include access to online bonus content. The pages are in very good condition and there are no markings.
The Manual of Free Energy Devices and Systems
There can no longer be any serious doubts about the practicality of the various «free-energy» units and systems based on the full-weight of the hardware evidence from at least fifteen different types of projects, as presented in this Manual.