Merging with the Billionaire by Jenna Brandt

A billionaire set on revenge, an heiress trying to prove herself, a company caught in the middle.

Conrad Gaines spent his whole life being made to feel inadequate, even after he got into an elite Ivy League college and created a company worth billions. Once he accepted he would never fit in, he focused on taking down those who made his life miserable.
Tiffany Boswell has always had to prove herself capable as any man. First to her professors, then to her father, and even to her brother. When she’s finally given the opportunity to co-run the family oil business, she’s determined to not let anything get in her way, especially a man like Conrad Gaines.
As the two rivals are forced to work together, the attraction simmering just below the surface comes billowing to the top. Can Conrad find a way to put his past hurts aside for a chance at love? Will Tiffany decide to take a chance on her brother’s enemy? And can they find a way to be together despite all the obstacles?