My favorites at the moment are: The Perks of Being a Wallflower, To Kill a Mockingbird, anything Sherlock Holmes, and Night by Eli Wiesel.
My favorite books: The Book Thief, U is for Undertow, American Gods, Perfume :)
Dexter's books. Scary and funny. Probably the only books that made me laugh out loud and then scare me just a few pages later. It's absolutely brilliant.
Best Books…

Brave New World, Count of Monte Cristo, Fahrenheit 451, American Gods, Redeeming Love. All great.

I love the Modern Faerie Tales by Holly Black, Harry Potter, the Young Wizards series by Diane Duane, anything and everything by Tamora Pierce, the Thief and sequels by Megan Whalen Turner, anything by Laurell K Hamilton, Patricia Briggs, Den of Shadows quartet by Amelia Atwater-Rhodes, and tons more that are on display in my closet and thus too far away for my piteous vision to identify at this point in time.
Harry Potter series. The Witch of Portobello. Veronika Decides To Die. The Perks of Being a Wallflower. <3
Is this still on? My favorite books are Sophie's World, Dance,Dance,Dance, Life of Pi, HP, Little Prince and Unbearable Lightness of Being. :)
Oh, good lord this always a marathon list. As just about any Tumblr-er I grew up on HP, but I also looooove Garth Nix's Old Kingdom trilogy, R. A. Salvatore's War of the Spider Queen and Drizzt Do'Urden books, anything Simon R. Green or Jacqueline Carey. The Redwall Books and everything Mercedes Lackey has ever written ever. Charlaine Harris and Holly Black are excellent, too. (My apologies for giving authors, but specific titles is far to long a list)
My favourite books are: Murphy's Boy, Ghost Girl, Twiligh Children, One Child, Carrie, Misery, Shining, Lisey's Story, The Little Prince, Divine Evil, The Man Who Mistook His Wife for a Hat, Da Vinci Code, Angels and Demons, A Child's World
My favourite books are Artemis Fowl, Percy Jackson, Bartimaeus Trilogy (funny, nobody's said that one), His Dark Materials, White Fang, The Kane Chronicles, The Heroes of Olympus, anything by L Frank Baum, and fanfiction.
Anonymous
My favorite books are The Uglies Series, Matched, The Looking Glass Wars trilogy, The Mortal Instruments, I Am Number Four (the book is much better than the movie), The Hunger Games trilogy, and all things faerie or supernatural!