After a brief moment of peace, a disturbance in the sky sends Zhii back to the ImagiNation - but not before entrusting Ace with the third piece of the Crystal Heart for safe keeping on Earth. With an adventure just behind him and a busy summer break on the books, laying low sounds like the perfect mission. Unfortunately, a new enemy has a different idea. If peace in the Milky Way is to be maintained, Ace and company’s adventure has only just begun.

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Book one: The Hidden Realm

Across the cosmos spins the ImagiNation, a once peaceful planet now under siege. Sensing doom, a wizard of crystals calls three young earthlings and the Imperor’s daughter to undertake a secret mission. Magic, danger and fantastical creatures lurk in the four corners of the ImagiNation as the unlikely candidates attempt to save the universe.