Deep in the African rain forest, near the legendary ruins of the Lost City of Zinj, an expedition of eight American geologists is mysteriously and brutally killed in a matter of minutes.

Ten thousand miles away, Karen Ross, the Congo Project Supervisor, watches a gruesome video transmission of the aftermath: a camp destroyed, tents crushed and torn, equipment scattered in the mud alongside dead bodies - all motionless except for one moving image - a grainy, dark, man-shaped blur.

In San Francisco, primatologist Peter Elliot works with Amy, a gorilla with an extraordinary vocabulary of 620 "signs," the most ever learned by a primate, and she likes to fingerpaint. But recently, her behavior has been erratic and her drawings match, with stunning accuracy, the brittle pages of a Portuguese print dating back to 1642...a drawing of an ancient lost city. A new expedition - along with Amy - is sent into the Congo where they enter a secret world, and the only way out may be through a horrifying death...

Michael Crichton was born in Chicago in 1942. His novels include the Andromeda Strain, Congo, Jurassic Park, and Timeline. He is also the creator of the television series ER.