I haven't read this one, but wondered if you were aware of the works of Tony Parker. Parker is deceased now, so most of his books are out of print, but he did a whole series of books where he interviewed various people in certain social situations or unusual jobs - lighthouse keepers being one of them (also prison officers). I have read the lighthouse book, which is simply called Lighthouse half a dozen times now. I came across it in the cottage I stay in on the Island of Lundy, which is known as the Old Light Cottage, as it was a former storehouse (among other things) for the island's lighthouse keepers.