Grinded

He's a battered M15 agent.
She's his childhood sweetheart.
Together, they're INVINCIBLE.
GRINDER
I'm hurt, but I'm not broken. You can't break me. I don't need pity, I just need her. Pia Deltetto. Miles and lives apart, I would do anything for her. And now, she's in danger, with time running out. I refuse to walk away-ever again.

PIA
Years ago, young and in love, Tuscany was our dream and he was my fantasy. Time has changed us, hurt us, shattered us. But I need him now to help me save my family's estate. With everything on line, now more than ever-I need GRINDED.

While each book in the Invincibles series is a standalone with its own HEA, they may be more enjoyable read in order.