Ewan MacRae is eighty-three years old and drives forty minutes twice a week to sit beside a woman who no longer knows his name. He brings honey. He brings a recording of the harbour where they lived. He brings, in his coat pocket, a photograph of her from sixty-six years ago a young woman in a red coat at a lighthouse, holding a camera, already looking at the next thing.

She holds the photograph face-down. He keeps coming anyway.

The Tide Between Us is a novel about a love that survived separation, class, secrecy, and sixty years of two people deciding what the other could bear to know and whether that decision was protection or theft. Set on the Isle of Harris in the late 1950s and in a care home by the Firth of Clyde in the present day, it moves between the year Ewan and Mairi Campbell first met and the year she is losing the memory of everything they were.

What it uncovers, slowly and without mercy, is that neither of them ever fully understood what the other gave up or why.

There is a development scheme, a set of altered minutes, an access road that was signed away before anyone admitted the proposal existed. There is a boatbuilder who cannot leave and a photographer who keeps documenting places she is about to leave. There is a daughter with her mothers eyes and her fathers stubbornness, spreading her great-aunts photographs across a kitchen table and asking the question her parents never quite asked each other. And there is a skiff named Agnes, sixty-seven years old and still on the water, named for a girl who wanted to leave the island and never got the chance.

This is not a love story about remembering. Its a love story about what persists when memory is gone what a person leaves in the shape of things, in the work of their hands, in the specific way they held a photograph before they slept.

For readers who felt hollowed out by The Paper Palace, undone by Lessons in Chemistry, and who have been waiting for a novel set in the landscape of Scotlands west coast that treats its people with the full weight of their complications this is that book.

It will stay with you longer than you expect.