My Fair Billionaire (Harlequin Desire)

Henry Higgins she's not! 

Back in school, stuck-up Ava Brenner may have been Peyton Moss's personal mean girl by day, but different kinds of sparks flew at night. Now the tables have turned, and Peyton's about to make his first billion while Ava's living a bit more humbly—to put it mildly. He needs her to teach him how to pass in high society, if they can manage to put old rivalries to bed. Soon, that's exactly where they end up! But will Peyton still want her when he learns about the scandal that sent Ava from riches to rags?