Black and white photo version. See other book options for color versions. As the Director of the Underwater Research and Recovery Team for the Mutual UFO Network, a PADI Scuba Instructor, and an experienced UAP/USO investigator, Debbie Ziegelmeyer has studied the USO (Unidentified Submerged Objects) phenomenon for decades. She now brings the culmination of this work to the public in this book. The Alien Colonization of Earth's Waterways presents evidence of USOs and underwater bases around the world from ancient times to today. The reader will find detailed evidence presented in this one-of-a kind book dating to the Bible, through medieval times and modern times, and modern U.S. Navy sightings which have been captured on film. Read accounts of not only submerged unidentified craft and extraterrestrials, but sightings of unidentified craft traveling on or underwater. The author compiled hundreds of reports which heretofore have not been placed in a collection such as this. Any serious UAP/USO Investigator will find this book a valuable reference.