The Secret of the Kingdom of Slide

Amber is almost twelve, and she is not in the mood for baby brothers, bossy cousins, or board games that cheat.

Then one stomp sends Amber, her little sister Ava, and their math-whiz cousin Mason whooshing down a magical slide into the Kingdom of Slide-a place where number geniuses live like royalty, artists are treated like servants, and one wrong answer can send you straight to the basement.

When Mason is swept up to a glittering tower, Amber must break the kingdom's unfair rules, rescue ...