(Hardback)

Albert and his teammates must find a way to correct an imbalance that threatens to destroy both the underground and the entire United States above while avoiding a traitor's attempt to gain Albert's Master Tile.

(Paperback)

(Hardback)

"Eleven-year-old Albert Flynn and his teammates must restore balance to a hidden underground realm before the Imbalance causes the western coast of the United States to be consumed by earthquakes, hurricanes, and other disasters"--