The author recounts her experiences with Koko, a gorilla, during the fourteen years she has been teaching her to communicate through sign language.
- ISBN10 0606040218
- ISBN13 9780606040211
- Publish Date 1 September 1988 (first published 31 December 1987)
- Publish Status Out of Print
- Out of Print 1 September 2015
- Publish Country US
- Imprint Turtleback Books
- Edition Turtleback School & Library ed.
- Format Hardcover (Library Binding)
- Language English