Reconstructed with the help of my library checkout records and my own bookshelves. Note: these were not actually all published in 2011. They’re just what I read last year. Sorry if that goes against the spirit of these lists! Where possible, I’ve tried to include the 2011 installments of the series I read.
The Lost Hero (The Heroes of Olympus), Book 1. Rick Riordan. Probably helps to have read the Percy Jackson series before this, since The Lost Hero directly follows it, though the point of view characters are not exactly the same...
Ghost Story: A novel of the Dresden Files. (Warning: read the previous books in the series first, or it will spoil you for all of them, as well as making little no sense.)
The ring of Solomon : a Bartimaeus novel / by Jonathan Stroud. Stand-alone prequel to the Bartimaeus trilogy. Can be read by itself.
The magician king : a novel / Lev Grossman. But read The Magicians, the first book in the trilogy, before getting to this one!
Supergods : what masked vigilantes, miraculous mutants, and a sun god from Smallville can teach us about being human / Grant Morrison. All comic fans of Grant Morrison should own a copy! 's as much a memoir as it is an analysis of Morrison's work and his thoughts on the comic book field. I enjoyed the book for its wit, enthusiasm, and insight. I will admit though, as the NYTimes review says, that "Mr. Morrison can be a spirited writer, but he is also prone to overstatement and hyperbole."
Well, yes. That's one reason I like him.
Odd and the Frost Giants, by Neil Gaiman. Short, young adult, delightful.
Deadline by Mira Grant. Zombie apocalypse goodness, as well as a political conspiracy thriller! Read the prior book in the Newsflesh trilogy, Feed, first though. “Alive or dead, the truth won’t rest. Rise up while you can.”
The Last Apprentice series by Joseph Delaney, whichever book in the series happened to come out this year. Wikipedia tells me it's Rage of the Fallen, though I'm actually just about to begin that, having only lately finished Rise of the Huntress.
Towers of Midnight, by Robert Jordan and Brandon Sanderson. Most excellent continuation of the Wheel of Time series, which I started when the first book came out. I can hardly wait until the next and final book comes out!