Barlowe's Guide to Extraterrestrials

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Barlowe's Guide to Extraterrestrials is a 1979 science fiction book by artist Wayne Barlowe, with Ian Summers and Beth Meacham. It contains his visualizations of different extraterrestrial life forms from various works of science fiction, with information on their planetary location or range, biology, and behaviors, in the style of a real field guide for animals, such as Roger Tory Peterson's guide to birds of North America. It was reprinted in 1987.
After the success of the work, Wayne Barlowe wrote a second book, titled Barlowe's Guide to Fantasy.