Juno Rushdan 
Wyoming Ranch Justice [EPUB ebook] 

In these parts, he’s the law The cowboy code is Matt Granger’s trademark as a rancher and law enforcement officer. So when a serial killer targets students in his small Wyoming town, he’s determined to deliver justice. Enter undercover detective Hannah Delaney, an excellent investigator he’s known for years…but one who is completely at odds with Matt. Despite professional differences and lingering attraction, they’ll have to combine forces to catch a killer.