Disappearance at Devil's Rock

Well, this was a long read. I mean, no, it isn't, it just took me long enough.
The story itself is intriguing, it is well-written, but it should have been maybe 100 pages shorter. The baginning and ending are powerful, but there are long stretches of padding and repetition in the middle, which is too bad, because the book loses momentum now and then.
But: it wasn't bad at all, and it also mangaes to surprise.