Black Hearted by Julie Ann Walker

He’s everything she ever wanted. She’s everything he never knew he needed. Can she convince him she’s the one?

The Black Knights are back and better than ever!

Samuel Harwood has spent his entire career working in the black and gray areas of international intrigue. Living in the shadows for so long has made him forget who he was and where he came from. Then a blast from the past, in the form of his ex-girlfriend’s kid sister, arrives on the front steps of Black Knights Inc, reminding him of everything he left behind. Except, she’s no longer a kid. And she’s in serious trouble.
Hannah Blue has been in love with Sam Harwood since she was in braces. When someone sabotages her entire life, he’s the first person she turns to. She has critical information about a potential cyber-attack on the U.S. power grid that could end in catastrophic financial damage and loss of life. But the FBI thinks she’s a traitor. And now she’s on the run to save herself and the fate of the entire nation.

Who does Samuel trust? The smart, sexy woman he’s known since he was a teenager? Or the government authorities who give him his orders and cut his paychecks? He’ll make one desperate play to find out. A play that could cost him everything…including his heart.