Mothman, the "winged man" whose appearances may have foretold a West Virginia disaster. The chupacabras, or goatsucker, whose vile deeds were first witnessed in Puerto Rico. The Dover Demon, sighted in only one place and time but become a permanent part of Massachusetts history. Are these and other monsters real or merely the stuff of nightmares? This book examines that question through eyewitness accounts and expert commentary.