Scent of Panic by Laura Scott

Search and rescue and love…
Searching for the son he didn’t know he had…
When tribal accountant Wynona Blackhorse realizes her son has been kidnapped, she has little choice but to call the only man who can find him. Her son’s father, Chase Sullivan. She’s willing to face the consequences, knowing nothing is more important than finding her four-year-old-son.
Chase Sullivan is furious with Wynona for keeping his son a secret, but all that matters now is doing everything possible to find the little boy. Chase knows his K9 Rocky is an excellent tracker, but the Wind River reservation is large and desolate. As he and Wynona follow clues as to where Eli has been, the case grows more convoluted. Time is not on their side. Will taking down the kidnappers bring Chase and Wynona closer together? Or tear them apart, forever?