From exotic wild species inhabiting unfamiliar settings to elusive forms still unknown to science or thought to be extinct, the Felidae, better known as 'cats', have been reported in sightings from around the world. According to conventional wisdom, they do not exist, but mystery cats of all sizes have attracted increasing attention from naturalists and laypersons alike, and the evidence for these animals is becoming more substantial and increasingly difficult to deny. Now, one of the world's leading cryptozoological investigators and field researchers offers a comprehensive field guide and overview of these mysterious cat-like creatures. Filled with photographs, comprehensive paintings, classifications, and hard evidence, this book offers an invaluable resource for those who wish to investigate these sightings further or simply enjoy the fascinating reports provided by others.