Seductive Lies by Tara Sue Me

Success. Wealth. Power.

Franklin Benedict left his three sons a legacy and an empire, and the brothers are now at the helm of one the most powerful shipping corporations in the world. Though they were raised as southern gentlemen, they have no problem living up to the playboy label they’ve been given.
Secrets. Lies. Betrayal.
But their father left behind something else. Something he thought long buried in the dark corners and the ever churning tide of the Charleston low country. And that something has the potential to tear apart the brothers and the women they’ve come to love, if it doesn’t destroy them all first.

Originally published as The Sons of Broad Series, all books have been rewritten and reedited. Each book tells the story of one brother. They can be read as standalones (with HEA) but the overall mystery won’t be solved until Book 3.

Book Two: SEDUCTIVE LIES (Originally titled DEADLY SECRET)
Bea Jacobs didn’t think she’d find anything when Knox Benedict asked for her opinion on old business files. But after being warned to stay away from the Benedicts and nearly beaten to death by an unknown assailant, she’s certain there’s something there. Though she’s willing to keep digging, her first priority is keeping Knox safe.
Knox is concerned with two things: finding out who hurt Bea and winning her back. And he’ll do anything to keep her safe, except leave her alone. He’s sure of her love for him, but suspects she’s keeping something from him.

Bea isn’t the only one with secrets. They are everywhere, from long lost letters to their own family members to the reappearance of a troubled young woman with her own burdens. Bea and Knox have the most unexpected secret, but someone close is hiding a deadly one, and they’re going to show Bea what happens when she ignores warnings.