Presents evidence that UFOs are mainly invisible and consist of both physical craft and living biological creatures. The author convincingly shows that our atmosphere is the home of huge, invisible living organisms that are sometimes confused with spacecraft when they become visible. Mr. Constable has photographed both types of UFOs with infrared film, some of which are reproduced in this expanded, updated edition. Despite his bold leap into the future, the general public and official ufology have a hard time accepting the evidence. In more recent years, teams of engineers and technicians in both Italy and Romania, unaware of Constable's earlier discoveries, obtained virtually identical infrared photos, published in Italy. In 1996, NASA used ultra-violet sensitive video to record swarms of invisible UFOs that looked like Constable's earlier photos. Examples are in this book. Also covered are earlier pioneers in important life energies that play a big role in this research, including Dr. Wilhelm Reich, Rudolf Steiner, and Dr. Ruth B. Drown. Recommended for those interested in UFOs and higher realms of physical reality.