I was looking for a book a friend had once told me about, and "Pharos" came up in my research. It wasn't the intended book, but it shared certain key points ("a book about a woman washed upon a lighthouse") plus it promised a ghost story and a Scottish island into the bargain! :D
The story started out strongly - I was looking forward to beautiful depictions of coastal British scenery and some delicious, fantasy-tinged mystery.
Unfortunately...
The storyline held potential, but I had issues with the execution. :(
The characters never came across as "actual people" i.e. convincing, recognizable personalities. They felt tenuous, ephemeral, insubstantial - I couldn't care for or connect with any of them.
The omniscient third-person-singular narrator moved between several perspectives, all of which proved highly unrealiable.
Unreliable narrators can be effectively employed in storytelling, of course, but narration here didn't build suspense gradually... The unsettling/horrific elements were inserted into the narrative almost willy-nilly, making the writing feel jumpy and jumbled, in my opinion. As a reader, I was annoyed rather than intrigued.
When "the mystery" got explained at the end, it felt jarring to me, again (even though, technically, hints were sprinkled throughout the text). Jarring in tone, mostly.
(lots of unclear, deliberately vague experiences/sightings, is it real/is it not?..., and then - BAM - here's this, this and that, but FOR REAL!)
The writing felt experimental to me, and a certain quote kind of corroborates this impression:
It was a giant depiction of his life with the meaning taken out: no narrative, no analysis, no thoughts. Just excerpts.
Now, the unfortunate "fact of life" is that, most of the time, writers are the only readers who enjoy (their own) experimental writing.
I think this story would have "hit" much harder, written from a more traditional approach.
Edgar Allan Poe, sir Arthur Conan Doyle, even F. Scott Fitzgerald all "grounded" their "more imaginative storylines" in POVs of respectable, ordinary, reliable narrators (old friend in "The Fall of the House of Usher", Watson in Sherlock-verse, Nick Carraway in "The Great Gatsby"). It was precisely the "unimpressiveness" of these narrators which strengthened the impact of the stories themselves.