Good Non-Fantasy/SF Novels for Fantasy/SF Fans

I just wrote a long post about Billy Liar and various other topics but you're going to be denied those insights, possibly forever: just as I was adding a link to finish things off there was a slip of the finger and my decrepit laptop interpreted this as me wanting to go "back" a billion times in quick succession in my browser - and now the post is gone, not even saved. Yay. I'm too dispirited to write it out again, so, in lieu of that, something totally different: a list of some good Non-Fantasy/SF Fiction Books for Fans of Fantasy/SF, jotted down in no particular order:

• We Have Always Lived in the Castle by Shirley Jackson. Could possibly be categorised as horror, but isn't really. I don't think it is the work of genius it is sometimes cracked up to be, but it's a very effective little novel you can read in one sitting.
• The Magus by John Fowles. You can't read this one in one sitting. You might want to, though. Possibly the best literary thriller ever written? I can't think of a rival candidate that comes close. Again, it could be categorised as horror, or fantasy, but isn't really either.
• Sophie's World by Jostein Gaarder. One of the rare huge bestsellers that I think deserves it. 
• The Name of the Rose by Umberto Eco. I mean, come on.
• Azincourt by Bernard Cornwell. You all know who Cornwell is and you have all read some of his books, of course. This is a lesser known one, but one of his better efforts (I think).
• Miss Smilla's Feeling for Snow by Peter Hoeg. Kind of feels like a technoir/cyberpunk novel, even though it isn't. 
• The Mysterious Mr Quin by Agatha Christie. Okay, it isn't a novel, but it has that character. It's Christie's strangest and, I think, best work: not fantasy, but almost like proto-slipstream fiction - stories about what happens when the real world touches something that isn't quite real itself.

Tell me some others.