@Mojo: I highly recommend all of them, but the last five are fairly easy reads (especially Harry Potty and The Protector of The Small).
American Gods is a great book to jump into if you haven't read anything else by Gaiman (he wrote "The Doctor's Wife last season of Doctor Who as well) It's about the idea that the gods immigrants brought to America with them never left. The cast of characters includes all sorts of mythological beings along with some great American style folklore as the old gods get set to go to war with new gods of technology. A human named Shadow is caught in the middle of it all. (PG-13)
House of Leaves is postmodern style novel about a house that is bigger on the inside. One day, a door leading down a mysterious hallway appears in the living room. An expedition is formed to explore it, but is something living inside? Meanwhile, a the young writer chronicling the story battles with his sanity. (R)
Atonement: young Briony witnesses a scene that changes the life of her, and the two other people involved. All of them will be acting and re-acting to it for the next twenty years. Takes place at the beginning of WW2 (PG-13)
Protector of the Small is harder to summarize. It follows a girl through her training to become a night of her kingdom. Along the way she deals with everything from powerful Magical enemies baby griffons to bullies.
@gwen: the Middle English can be intimidating. It's easiest if you say it out loud (everything is written phonetically since ere was no standardized spelling) and remember the Great Vowel Shift (everybody talked an octave lower back then). I reccomend the Miller's Tale at least. Or just watch this:
http://m.youtube.com/#/watch?v=GTMPvpiu ... TMPvpiuyRYSir Gaiwain is one of my favorites, part of the reason I became a medieval scholar. I love the ambiguity of the ending.
I have a copy of the Song of Roland on my shelf, but I haven't started it yet.
So much universe, so little time...