Sparkes, Amy. House at the edge of magic (Series) #2

Nine and her friends have broken the curse on their marvelous, magical house and are free to travel the worlds once more! Their first stop: the Wizarding Hopscotch Championships. There's only one problem: the house is nervous about traveling and gets the hiccups! Bouncing from world to world with every hic!, they finally land at the championships, only for Flabberghast to have an unfortunate run-in with square number nine that leaves them all faced with the terrible Tower at the End of Time. But their sinister new location may be just the place to cure the house's hiccups and even uncover who left Nine her beloved music box as a baby and who Nine really is.--

Ages 8-12

Grades 3-6