The Land of Stories: Worlds Collide by Chris Colfer (Book 6)

Alex and Conner's biggest fear has come true. The Land of Stories fairy-tale characters - both heroes and villains - are no longer confined to their world! With sinister plans being put into motion by Morina, the Wicked Witch of the West, the Queen of Hearts, Captain Hook, and the rest of their evil literary army, Conner doesn't think the situation can get any worse. That is, until Alex goes missing! While mayhem brews in the Big Apple, Conner and his friends will have to fight their biggest battle yet. But without Alex by his side, Conner doesn't know how he will win the war and keep everyone he loves safe. Can Conner find Alex before it's too late? And can the twins restore order between the human and fairy-tale worlds?