A Bargain with the Boss (Chicago Sons #3)

With her boss, it's all work and all pleasure! Only from New York Times bestselling author Barbara Dunlop! 

For years, Tuck Tucker has played the role of carefree billionaire. Yet when his brother goes MIA, Tuck takes over the family empire. He knows what he has to do—and who he needs. Getting his brother's dedicated assistant to help, however, is tricky. Amber Bowen is smart, sexy and determined to keep his brother's whereabouts a secret. But everyone has a weakness, and Tuck won't lose a fortune…or an opportunity with Amber. He's found the perfect way to tempt her into making a bargain with the boss.