Book excerpt: It has often been said that we know more about the surface of the Moon than we do about the world's seas and oceans. The study of USOs (Unidentified Submersible Objects) is a case in point. For years, strange phenomena have been reported by people at sea, especially by navies around the globe. Although many of the USO files of the Soviet and Russian Navy remain secret, some have become available due to the painstaking efforts of dedicated researchers. Paul Stonehill and Philip Mantle reveal strange encounters by the Soviet and Russian Navy with things that are not supposed to exist. Here you will read about the mysterious kvakeri, the "swimmers" of Lake Baikal, the oddities of Issyk Kul, inexplicable events within the forbidding Arctic Ocean, and much more. Most of these stories have never been told outside of Russia or the former Soviet Union. They provide yet more evidence that we are not alone. Indeed, they suggest a permanent presence of something unusual in the depths of Earth's large bodies of water.About the authors: Paul Stonehill, a former Soviet Jewish refugee from the USSR (Ukraine), is an American lecturer, author, and researcher of Russian and Eurasian ufology and paranormal phenomena. He has spoken at numerous conferences throughout the U.S. and Europe, and has written many articles in English and Russian on UFOs and USOs, as well as several articles about the history of ancient China and its paranormal aspects. He is the co-author with Philip Mantle of several books about Soviet and post-Soviet UFO phenomena. Philip Mantle is an international UFO researcher, lecturer and broadcaster. His books have been published in six different languages around the world. He is the former Director of Investigations for the British UFO Research Association and former MUFON representative for England. Philip has written articles and features for numerous publications around the world and has been both editor and assistant editor of high street UFO publications. Philip lives in Pontefract, West Yorkshire, England.