Without a Trace (Fever's Edge #1)
Lynn Hagen

Lincoln knows something is going on with his ranch worker. Red is withdrawn, quiet, and keeps dodging Lincoln whenever they are near each other. Lincoln isn’t giving up. Not when Red is his mate. Not when those haunting eyes keep Lincoln up at night, wondering why Red acts the way he does. When his stables catch fire and one of his workers is attacked, Lincoln goes on alert, especially when Red goes missing, and it’s up to Lincoln to save him.