Here are my favorite books published in 2013, listed alphabetically by author, because there's no way I could rank them in order of preference.
The Girl Who Was Supposed to Die by April Henry (Henry Holt and Co. hardcover, 11 June 2013).
Hero (The Woodcutter Sisters #2) by Alethea Kontis (HMH Books for Young Readers hardcover, 1 October 2013).
Dark Triumph by Robin LaFevers (HMH Books for Young Readers hardcover, 2 April 2013).
Just Like Fate by Cat Patrick and Suzanne Young (Simon Pulse hardcover, 27 August 2013).
Kenning Magic by Lizzie Ross (Saguaro Books, 6 March 2013).
Fangirl by Rainbow Rowell (St. Martin's Griffin hardcover, 10 September 2013).
This Song will Save Your Life by Leila Sales (Farrar, Straus and Giroux hardcover, 17 September 2013).
Star Cursed (The Cahill Witch Chronicles #2) by Jessica Spotswood (Putnam Juvenile hardcover, 18 June 2013).
Rose Under Fire by Elizabeth Wein (Disney-Hyperion hardcover, 10 September 2013).