The possibility of a monster inhabiting a deep, dark Scottish loch has fascinated believers and sceptics for decades. In this volume, Steuart Campbell critically examines the facts and fictions regarding the mysterious creature of Loch Ness. He reviews the film and sonar evidence, analyzes underwater photographs, reflects on the origins of the Loch Ness monster stories, and gives a short survey of evidence from lakes all over the world. The text also provides references and a bibliography. The author's scientific background and presentation seeks to allow readers to decide for themselves about the reality of the Loch Ness monster. This edition contains additional material and evaluations of developments since the first edition was published.