To Love a Scoundrel (The Law and Disorder #4)
Sharon Ihle, June Cameron

Ladykiller: He lived for passion. A magnetically handsome riverboat gambler, Brent Connors could have any woman he wanted. Except the one “jewel” he desired most of all.
He was a man used to winning. She was a lady with a mission: to track the notorious Jesse James. But Brent saw a secret fire burning behind Jewels disguise—a wild, sensual longing that betrayed her undercover mission. They were both searching for robbers—but what they found was a treasure more precious than gold, more savage and reckless than a stolen kiss...Their love was the greatest danger of all.