Her world revolved around him. Then he left. 
She's determined to show him what he walked away from...
When Ian left for college. Mercy begged to go with him. He refused.
Mercy found her own way out. More than a decade later, it will take her best friend's wedding to bring her back to town for more than a layover. Mercy's here for Liz. That won't stop Mercy from teasing, tempting, and pushing Ian's limits... Mostly to show him what he left behind. Only partly because he looks like a god in his tux.
The moment Ian sees Mercy—confident, stunning, and definitely all grown up—he wants a taste before she vanishes back to the big city. Then Liz discovers her fiancé is already married to someone else. Ian won't add more heartbreak to his sister's life by hitting on her best friend. Besides, Mercy's advertising firm is competing with Ian's for the same make-or-break-me contract.
Mercy and Ian are determined to go their separate ways, but fate has other plans.
As they're thrown together again and again, the temptation of forbidden fruit proves impossible to resist... but giving in could send their worlds, and the lives of those they care about most, spiraling out of control.
Author's Note: This book was previously titled The Rival and the Billionaire. No content has changed.