Kept Behind His Walls

Harrow Keep has one gate, one wall, and one rule: no one comes in, and no one leaves without Declan Ashgrove's permission.
I'm hired to tear a piece of it down.
The contract is clear. I live inside the walls for the entire winter, report to him personally, and sign an NDA that would destroy my firm if I broke it. Declan is forty-two, a billionaire who owns half the Atlantic shipping lanes and trusts nobody. When someone sabotages the east wing, he draws the circle tighter: I stay within the walls, I stay where he can see me, and I answer to him. He calls it protection. It sounds a lot like possession.
The problem is that I like how he watches me. I like how he notices what I've skipped, what I've avoided, and what I haven't said. And every night, I feel the pull of the one thing I came here to hide: I'm Walter Reyes's daughter, the partner Declan supposedly ruined, and somewhere behind these walls is the proof.
He built this place to keep the world out. I came to find out what he's keeping in.
Kept Behind His Walls is a standalone, full-length romance with a guaranteed HEA, featuring a controlled, possessive hero, a heroine who negotiates every inch of her surrender, and a slow burn that no storm shutter can contain.
Tropes: Billionaire Hero • Forced Proximity • Possessive Alpha • Age-Gap (16 years, both adults) • Workplace Arrangement • Slow-Burn Forbidden • Secrets