Book excerpt: The murky depths and unexplored underwater caves of Loch Ness hold the secrets of one of nature's greatest mysteries ... The Loch Ness Monster. Now that sonar photographs have proven that the monster does indeed exist, the search for the answers to these fascinating questions is just beginning ... Is "Nessie" the last surviving member of a species of Pleisaur that has been extinct for millions of years? Is it a mammal or a reptile--or is it unclassifiable according to present standards? Is it the relic of a lost underwater civilization? Is there a connection between the monster--and the Hollow Earth Theory? Is the monster's secret tied in with the unexplained disappearances in the Bermuda Triangle? If man unravels the secrets of UFOs, will he also uncover the origins of The Loch Ness Monster? Is the monster's existence recorded in ancient artifacts, and his picture carved in age-old pyramids?