Renegade by Susan Sheehey

Cascade Creek is the perfect home for Lynée Clark—the mountains, her friends, a cozy home, her dream job at the library. Life simply couldn’t be any more perfect. When a scruffy, tattooed man rides into town on his metallic stallion to arrest her best friend’s boyfriend, her perfect world is upturned into chaos. Everything goes wrong, her best friend is forced into hiding from a cartel assassin, and her predictable days are thrust into upheaval. But the only way to bring home her friend and return her turbulent life back to normal is to help the DEA Special Agent on his case to uncover the truth. Which means spending a lot of time up close and personal with this bearded troublemaker in leather with zero manners and an addiction to cursing.

Jace Ivy has one mission: capture a rogue DEA agent that all others have failed to seize. After three months of tracking, Jace claims victory on his most difficult trace yet. Only to realize Reed Monroe might not be the double-agent his bosses claim. Thanks to a bloodthirsty cartel hitman, bumps in the road grow into massive roadblocks. Ones he can’t break down without the help of an unexpected research assistant, a local librarian who volunteers to help him so her best friend can return home. Lynée accomplishes much more than deciphering the mountains of evidence in his case, but also batters down his defensive walls and beastly façade. How can he resist turning Miss Prim-and-Proper into a seductive temptress with an equally dirty mouth?