This book investigates the existence and reported sightings of mysterious aquatic creatures across the globe. Loren Coleman and his co-investigator present a comprehensive guide to lake monsters and sea serpents, drawing on numerous reports from the twentieth century. The book details when and where these creatures have been sighted, offering classifications and drawings to aid in understanding these phenomena. It serves as a resource for those interested in investigating such claims or simply exploring the fascinating accounts of these enigmatic beings.

This field guide is presented as an invaluable and unusual resource for the intrepidly curious, offering a globetrotting exploration of reported aquatic mysteries. The book aims to provide comprehensive drawings, classifications, and maps to assist in investigating sightings firsthand. It caters to those fascinated by the accounts of creatures that have captured public and sometimes scientific imagination. The material suggests a detailed compilation of anecdotal evidence and investigative efforts within the field of cryptozoology.