Dune And Debt. Undertow Sins, #13

"You can own the deed or you can own the memory. The land knows the difference."Petra Vance is a coastal scientist with a dangerous obsession. Every summer, she illegally crosses a tidal creek in the dark to camp on an isolated Georgian barrier island, studying the fragile sea oat dunes her grandmother planted before a wealthy family bought the land out from under them. She thinks she leaves no trace.
She is wrong. Ewan Blackthorne, the brooding and heavily scarred current owner of the 1, 300-acre estate, has known about her trespassing for three years. He has monitored her through infrared trail cameras, secretly stocking a rusted fishing cabin for her arrival, completely unable to stop watching. When Ewan finally confronts her, he offers a brutal ultimatum: face jail time for criminal trespassing, or stay in the cabin and work off her debt through twelve weeks of grueling manual labor under the blistering July sun.
Petra accepts the coerced arrangement, leading to a tense, forced-proximity standoff. They spend their days doing heavy dock maintenance separated by strict, unspoken boundaries, enveloped by the sweltering heat, pluff mud, and Spanish moss of the untamed coast. But when a massive tropical storm forces them into lockdown inside Ewan's main house, the fragile distance between them finally collapses.