Wizard of Rondo. Emily Rodda. 2008.

The fantastic world of Rondo can be perilous, but Leo and Mimi know they can't keep away. They have to play their part in the continuing battle to keep Rondo safe from their deadly enemy, the remorseless Blue Queen. Plunging once more into the magic world within the antique music box, they are determined to stay out of trouble. But Rondo's spell soon draws them in, and their quest to find a missing wizard becomes something far more dangerous as they try to track the Blue Queen's henchman, Spoiler, and confront an ancient terror lurking in the skies of the north. Filled with fun, excitement and startling twists, this outstanding sequel to the highly acclaimed The Key to Rondo is as rich, surprising and irresistible as Rondo itself.