 Cryptozoology: Science & Speculation by Chad Arment. A look at the methods of and justification for cryptozoology. It includes profiles of a number of critters that are seldom mentioned in other books, such as long-tailed bobcats.
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 Rumors of Existence: Newly Discovered, Supposedly Extinct, and Unconfirmed Inhabitants of the Animal Kingdom by Matthew A. Bille. This book ignores the big controversial creatures of cryptozoology and instead focuses on dozens of more ordinary and plausible animals that just might be out there.
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 Varieties of Anomalous Experience: Examining the Scientific Evidence by Etzel Cardena, Steven J. Lynn & Stanley C. Krippner. This book looks at the features common to ordinary people who have scientificly inexplicible experiences, without making any judgments as to whether things like monster sightings are real or not. While not truly on topic, it is a good reference book for any cryptozoologist to read.
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 Cryptozoology A To Z : The Encyclopedia Of Loch Monsters Sasquatch Chupacabras And Other Authentic Monsters by Loren Coleman & Jerome Clark. This is THE essential guide to cryptozoology. If a creature that is not supposed to exist has received much attention from scientists, it is probably in here. Notable for the success stories it includes of creatures that have now been officially discovered.
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 Unexplained!: Strange Sightings, Incredible Occurrences & Puzzling Physical Phenomena by Jerome Clark. A huge guide to all sorts of weird phenomena that defy science, yet have enough evidence going for them that they attract a great deal of support. Nearly a third of the book covers cryptozoological creatures.
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 A Dictionary of Cryptozoology by Ronan Coghlan. This recent book contains detailed descriptions of many cryptozoological creatures. It even contains beings such as the Jersey Devil that are often thought to be too supernatural for other books to consider them seriously.
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 Mysterious Creatures: A Guide to Cryptozoology by George M. Eberhart. This giant guide covers more than a thousand creatures that are unrecognized by science or may have been prematurely declared extinct. These creatures are divided into 40 major categories. It also lists animals that have been discovered within the last hundred years.
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 Encyclopedia of Cryptozoology: A Global Guide to Hidden Animals and Their Pursuers by Michael Newton. This 576-page work contains entries on 2,744 subjects, including many individual cryptids and subjects such as cryptotourism.
Also, see the author's homepage.
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 Giants, Monsters, and Dragons: An Encyclopedia of Folklore, Legend, and Myth by Carol Rose. As the title suggests, this book examines many creatures from the standpoint of folklore and mythology. Among these mythical beasts, it covers a surprising number of cryptids such as sea serpents, thunderbirds and Bigfoot.
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 The Beasts That Hide from Man: Seeking the World's Last Undiscovered Animals by Karl P.N. Shuker. A good examination of many undiscovered animals, focusing on those that are most likely to exist. It includes an updated list of current cryptids in the back of the book, including new information on them.
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