With All Your Heart — Sara Mitchell

Luke is longing for peace and purposes: Leya is searching for the will of God. In God's providence, they find each other.
Cattleya McLendon -- raised by her missionary mother, Leya is as tender and gentle as the orchid, but with a strength of faith that enables her to weather the toils and dangers of a jungle missionary's life, as well as the confusion of being catapulted back into her father's despotic guardianship.
Lucas Farringer -- by becoming a wildlife biologist, Luke had rejected the extravagant wealth and glamour of his parent's superficial, empty world. Now on assignment in the steamy Columbian jungles of South America, he's tracking a wounded jaguar, but instead he comes upon Leya, and discovers that he's really searching for much, much more...