Heart of the Amazon — Margaret Daley

There was no way her brother was dead. Officials claimed the biochemist had been murdered in the Brazilian rainforest, his body fallen prey to the mists of the jungle. But Kate Collier knew Zach and couldn't leave it at that; Zach was all she had left.

Tall, dark and mysterious, A. C. Slader had a past that was as turbulent as the Amazon River. Yet he was the only one who could guide her on a journey from which many never returned. A journey that would stretch the limits of their faith in God and each other....