Ok, this answer might be a little long. But in my defence, it's only because I love books too!
Anything by Tamora Peirce- she's written:
The Immortals quartet:
Wild Magic
Wolf Speaker
Emperor Mage
In the Realms of the Gods
The Song of the Lioness quartet:
Alanna- the First Adventure
In the Hand of the Goddess
The Women Who Rides Like a Man
Lioness Rampant
The Circle of Magic quartet:
Sandry's Book
Briar's Book
Daja's Book
Tris's Book
The Circle Opens Quartet:
Magic Steps
Street Magic
Cold Fire
Shatterglass
The Protector of the Small quartet:
First Test
Page
Squire
Lady Knight
and all her single books:
Beka Cooper- Terriar
The Trickster's Choice
The Trickster's Queen
The Will of the Emperess
-LOVE THESE! (I hope I remembered them all...)
They're Fantasy, of course. Most things I'm likely to recommend are. I'll note it if they're not, though.
Redwall
Martin the Warrior
Mariel
The Pearls of Lutra
High Rhulain
Mossflower
Mattimeo
The Bellmaker
Salamandastron
The Outcast of Redwall
Marlfox
The Long Patrol
The Legend of Luke
Lord Brocktree
Taggerung
Triss
Eulalia!
Loamhedge
Doomwhyte
and Rackety Tam
- These may be written for younger kids, but the poetry in them is well worth reading. I've read them since second grade, and still haven't found something with as good a vocabulary as they have (well, besides Tolkien, obviously.)
Monica Furlong's books-
Juniper
Wise Child
Colman
-These are really thought provoking!
Madeleine L'engle's books-
the Time quintet:
A Wrinkle in Time
A Wind in the Door
A Swiftly Tilting Planet
Many Waters
An Acceptable Time
The Austin Family:
Troubling a Star
A Ring of Endless Light
- Oh. My. Goodness. I love her writing! Especially a Ring of Endless Light. Too perfect. :O
Terry Pratchet-
In Ankhmorpork-
Going Postal
Gaurds! Gaurds!
Feet of Clay
Thud
Jingo
The Color of Magic
The Light Fantastic
Eric
Soul Music
Interesting Times
Hogfather
The Fifth Elephant
Night Watch
On the Ramtops-
Equal Rites
Wyrd Sisters
Lords and Ladies
Carpe Jugulum
Witches Abroad
Maskerade
On the Chalkdowns-
Wee Free Men
A Hat Full of Sky
Wintersmith
With Death Featuring prominently-
Mort
Reaper Man
Other-
Pyramids
Good Omens
Eric
Small Gods
Monsterous Regiment
- THESE ARE SO INCREDIBLY HILARIOUS!!
(Exclamation marks go on forever, but I've managed to squash "Forever" into one line, for your conveniance. Just imagine that there's a whole lot more of them.)
Elizabeth Peters-
Lord of the Silent
He Shall Thunder in the Sky
Children of the Storm
The Snake, the Crocodile, and the Dog
The Golden One
The Hipopotomus Pool
The Last Camel Died at Noon
The Ape that Gaurds the Balance
The Falcon at the Portal
Seeing a Large Cat
The Lion in the Valley
Curse of the Pharoahs
The Mummy Case
The Crocodile on the Sandbank
- I love these! They're really good (if you like mysteries).
Kate Constable-
The Singer Of All Songs
The Waterless Sea
The Tenth Power
- These are pretty good... The last one is really, really sad though...
J.R.Tolkien-
The Hobbit
The Fellowship of the Ring
The Two Towers
The Return of the King
- These definately deserve a mention. Undoubtedly, they are some of the best literature ever written. It goes without saying.
Eoin Colfer-
Artemis Fowl
Artemis Fowl and the Arctic Incedent
Artemis Fowl and the Eternity Code
Artemis Fowl and the Opal Deception
Artemis Fowl and the Lost Colony
Artemis Fowl and the Time Paradox
- I like these a lot. They're not particularly well written, but I'd recomend them if you had run out of good things to read.
William Shakespear-
The Tempest
As You Like It
Hamlet
Christopher Paolini-
Eragon
Eldest
Brisingr
- The plotline on these is a bit like a jigsaw puzzle, but they're a very satisfying read!
Libba Bray-
A Great and Terrible Beauty
Rebel Angels
The Sweet Far Thing
- These have a bit of adult content, but they're written intriguingly.
Maximum Ride: The Angel Experiment
Maximum Ride: School's Out Forever
Maximum Ride: Saving the World and Other Extreme Sports
Maximum Ride: The Final Warning
Maximum Ride: MAX
- These are for people who are a little more impatient for the story plot to start quickly. Very full of adventure, and very enthralling. I didn't really like 'The Final Warning', but that's just me. And 'MAX' more than made up for it!
Then there are the Harry Potter books, but I'm not even going to bother recomending those. I'm sure you've read them.
Robin McKinley-
The Hero and the Crown
The Blue Sword
Deerskin
Beauty
Spindle's End
Dragonhaven
-She has an interesting style. Some