Will Worthington and The Black Rainbow (Paperback) (ISBN-13: 9781068672408)

When Will reluctantly goes to Austria on a school trip, he becomes lost in a terrifying blizzard, and finds himself returning to Austassa, the quirky, floating land where his nightmares become a reality ... and everything he once trusted turns to dust.

Tasked with killing The Black Rainbow, a monstrous molten-lava invention which threatens to destroy all of Austassa ... and on top of this madness (including staying in a pineapple-themed hotel), he must do whatever it takes to evade the clutches of his piano-playing mastermind foster brother, Kazamir Kirrolivitch, whose biggest dream is to destroy Will ...

at any cost.