If all recommendation engines can do is essentially try to find the right cohort for you (which is how they all work because they can just try to go "people who liked A also tended to like B"), then you'll never like them if you have narrow tastes. Recommendation engines are blunt instruments, after all. Just think of how fundamentally unreliable "people who liked A tended to like B, so you might like B too" actually is for such a personal topic.

You'd have to wait until recommendation engines can read your mind and run your simulation against books.