Rough Rider. B.J. Daniels

He was sure he could handle one petite PI with an attitude – but he'll need her help to solve the secret of his missing sister and outwit a ruthless killer! Boone McGraw is in Butte on the hunt for his kidnapped baby sister. What he wasn't expecting to find was feisty private investigator CJ Knight. Desperate to solve her partner's murder, CJ doesn't believe her case could possibly be connected to the sexy horse breeder's investigation…until they find themselves running for their lives – together!