New York: Alfred A. Knopf, 1980. dj. Hardcover first edition - A research team deep in the jungle disappears after a mysterious and grisly gorilla attack. A subsequent team, armed with the latest gifts of advanced technology (that is, 1980s technology) as well as a sign-language-speaking simian named Amy, follows the original team's tracks in search of the diamonds of the lost city of Zinj. 348 pp. ISBN: 0-394513924.