Susan May Warren 
Rescue Me (Montana Rescue Book #2) 

When Deputy Sam Brooks commits to something, nothing can sway him–not just on the job as liaison between the Mercy Falls sheriff’s department and PEAK Rescue, but in his private life. He’s the one who stuck around to take care of his mother after his father’s accidental death. And he’s the one–perhaps the only one–who believes Sierra Rose is the perfect girl for him. Safe, practical, and organized, she’s nothing like her hippie, impulsive, bleeding heart sister, Willow.Willow, however, has been in love with Sam Brooks for as long as she can remember. But she wants her sister to have a happy ending. Besides, Willow has other things to focus on–namely, nabbing the job as youth pastor for her small-town church. Best thing for her to do is to purge Sam from her heart.Neither can predict the events that will bring them together in a fight for their lives in the forbidding wilderness of Glacier National Park. Stranded, injured, and with the winter weather closing in, Sam and Willow will have to work together to save a crew of terrified teenagers. As they fight to survive, they might just discover a new hope for love.