Seducing the Billionaire's Daughter

Despite the prestige of his last name, Sawyer Taggart clawed his way to the top. As the illegitimate son the Taggarts can no longer ignore, he wants what's rightfully his—control of the security firm that's worth billions. But first, he has to take out the competition. 
London Montgomery refuses to use her last name to get ahead. As the only girl in the trio of billionaire Montgomery siblings, she's a prime target for fortune hunters. To keep herself safe and please her family, she stays on the straight and narrow... until she meets Sawyer Taggart. No matter how many roadblocks she throws in his way, the darkly seductive businessman continues to ruthlessly pursue her. 
Now London has to decide if she'll risk it all to be with Sawyer, or choose a man her family approves of... In the meantime, you can read:
Seducing the Billionaire's Wife
Seducing the Billionaire's Brother