Liza Cody: Rift (UK 1994)
From the Publisher:
Fay Jassahn is young, naive and in East Africa for the first time. Determined to prove her independence, she ignores the warnings of wiser folks and follows the Rift Valley north to Ethiopia. But it is 1974, a revolution is brewing and Fay could not have chosen a worse time to travel - soon she is caught in a web of death, chaos and deceit.
Liza Cody: Rift. Arrow; ISBN: 0099231212 (September, 1994), 280 p., £4.99.