Grace Livingston Hill 
A Voice in the Wilderness [EPUB ebook] 

While on her way to Arizona to teach school, beautiful Margaret Earle suddenly finds herself lost in the wilderness. When a ragged man happens across her in the middle of the night, she believes help has arrived—but he turns out to be even more threatening than the wilderness, and Margaret runs from him in desperation. Lost once more, besieged by the elements, terrified by the howling of wild beasts around her, Margaret wonders how she will survive.
Enter Lance Gardley, a handsome young cowboy who rides out of the darkness to save Margaret’s life—and together they discover a new understanding of true friendship… and love.