Dragonskin slippers - Jessica Day George

Fifteen-year-old Creel is floored when her aunt suggests they sacrifice her to a dragon to attract the attention of a marriageable knight. But when the dragon appears, Creel bargains for her life - and ends up with an unusual pair of blue slippers. It's not until the slippers are stolen by a princess that Creel learns a terrible truth: the slippers are made from the hide of a dragon queen, and enable the wearer to control all the dragons in the land. Now under the command of the princess, who is eager to start a war, the dragons begin to attack the city. Creel must join forces with the king's son and others to break the slippers' hold before the princess and the dragons destroy the city - or before the king's archers kill the dragons - whichever comes first.