Koko (born July 4, 1971, in San Francisco, California) is the name of a captive, acculturated gorilla trained by Dr. Francine 'Penny' Patterson and other scientists at Stanford University to allegedly communicate with more than 1,000 signs based on American Sign Language, and understand approximately 2,000 words of spoken English. She has lived most of her life in Woodside, California, but plans for a move to a sanctuary at Maui, Hawaii are nearing attainment.

Koko is horror thriller novel written by Peter Straub and first published 1988 in the US by EP Dutton, New York, and in Great Britain by Viking. Winner of the World Fantasy Award for best novel in 1989.

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