Knock Knock by Dale Mayer

There's no best-by date for revenge.

Wealthy and beautiful Shay Lassiter runs a prestigious foundation, but her connections and resources were worthless when her fiancé tried to murder her. Now, she's guarding her heart and using her knack for reading people's intentions - both good and evil - to guide her. But when the foundation's clients start dying, she must turn to the new man in her life...one who's giving her mixed signals.

Computer specialist and ex-cop Roman Chandler has a secret. It involves Shay and could ruin the fragile relationship he's building with her. Though he can't tell her the truth, he needs to convince her to trust him. He fears that whoever is behind this is about to turn his vengeance on Shay...

And vengeance can be deadly.