Neil Gaiman is an amazing author! Any of his books are good. Try Neverwhere, Stardust or Coraline.
Edgar Allen Poe is a really good author. Check out his poems and short stories.
William Shakespeare is good too.
Any book by Scott Westerfeld and Neal Shusterman are good too.
Any books by Amelia Atwater-Rhodes are amazing! There is In The Forest of The Night, Demon In My View, Shattered Mirror, Midnight Predator. And then there is the The Kiesha'ra series: Hawksong, Snakecharm, Falcondance, Wolfcry and Wyverhail.
A Northern Light by Jennifer Donnelly
Blood and Chocolate by Annette Curtis Klause
The Princess Bride by William Goldman
13 Little Blue Envelopes and Girl At Sea by Maureen Johnson
Abarat by Clive Barker, Make sue you get the hardcover version though!!! If you liked the first one be sure to check out the next book in the series Abarat: Days of Magic, Nights of War.
Daughters of Destiny series: Keeper of the Winds,Keeper of the Waters, Keeper of the Flames and Keeper of the Earth by Jenna Solitaire.
The Abhorsen Trilogy (Sabriel, Lirael, Abhorsen) by Garth Nix
The Maximum Ride series (The Angel Experiment, Schools Out Forever, Saving the World and Other Extreme Sports, The Final Warning) by James Patterson
His Dark Materials trilogy (The Golden Compass, The Subtle Knife and The Amber Spyglass) by Philip Pullman
A Great and Terrible Beauty, Rebel Angels and The Far Sweet Thing by Libba Bray
The Riddles of Epsilon by Christine Morton-Shaw
The Cry of the Icemark by Stuart Hill
The Haunting of Alaizabel Cray by Chris Wooding
Inkheart and Inkspell and Inkdeath (coming soon!) by Cornelia Funke
The Hobbit and The Lord of the Rings trilogy by J.R.R. Tolkien
The Secret Under My Skin by Janet McNaughton
Nick and Norah’s Infinite Playlist by Rachel Cohn and David Levithan
All-American Girl by Meg Cabot
The Wind Singer, Slaves of the Mastery and Firesong by William Nicholson
Tuck Everlasting by Natalie Babbitt
The Sight and Fell by David Clement-Davies
The Prophecy of the Stones by Flavia Bujor
Old Magic by Marianne Curley
The Earthsea series (starting with A Wizard of Earthsea) by Ursula K. Le Guin
Shadow Spinner by Susan Fletcher
The Alchemist by Paulo Coelho