It's an ape! It's a lizard! It's a lion! It's a bear! No ... it's something else. It sleeps in the water. It roams the land at night. Beware! This book is a comprehensive list of sightings of the "Dewey Lake Monster." The Dewey Lake Monster was named after the location of the most famous sighting in 1964, though the 10 foot tall hairy biped has also been spotted throughout southwest Michigan over the years.