West of the Sun — Lynn Erickson

She was a mystery he couldn't solve

In all the years Ben Tanner had been investigating UFO sightings for the United States Air Force, he'd never come across something he couldn't explain. Then animals started dying on Julie Hayden's ranch in a remote corner of New Mexico.

Suddenly Ben found himself confronting two mysteries -- the mystery of a forgotten tribe living in a hidden valley and the deeper mystery of a woman.

To Ben, Julie Hayden's heart seemed as hard and parched as her drought-stricken land. But under the valley's influence, Julie began to blossom again and Ben himself rediscovered the meaning of love and wonder....