Ella and Owen 10: The Dragon Games! in Bloomington, MN

In book 10 of the Ella and Owen series, Ella enters a dragon flying contest and is magically sabotaged by one of the other contestants!
Ella enters a dragon flying contest and is magically sabotaged! When Ella blames Squeaky the gremlin, it's up to Owen to clear the gremlin's name and find the real culprit.
Will Owen be able to discover who sabotaged Ella, and can Ella find a way to undo the spell in time to win the contest?