Congo

English - Paperback
Michael Crichton's "Congo" is a techno-thriller novel first published in 1980. Here's a brief description:
In the depths of the Congo rainforest, a high-tech expedition sets out to uncover the secrets of a lost city and a mysterious diamond mine. What begins as a scientific mission quickly turns deadly, as the team confronts not only the harsh wilderness and volatile political landscape of central Africa, but also a new, terrifying species of highly intelligent and aggressive gorillas—guardians of an ancient civilization's secrets.
Led by a computer expert, a seasoned mercenary, and a talking gorilla named Amy, the group races against time, nature, and human greed in a gripping adventure that blends cutting-edge science, ancient myths, and raw survival.