Timothy and Cassandra have defeated the sorcerer Alhazred but in so doing have weakened the dimensional barrier which had prevented the Wurm from attacking their world.

Timothy is a freak, a weakling, an impossibility. He's the only person in existence without magical powers and has spent his entire life hidden on a remote island. When Timothy is finally taken back to the city of this birth, he is fascinated by the current of magic that fuels the world, and mesmerized by the buildings and orbs that hang weightlessly in the sky. But he is also marked for death. Assassins are watching his every move, and the government...

Twelve-year-old Tom and his cohorts continue their seemingly impossible quest to find the pieces of the Spark that will save Dreaming--and the Waking World--from the evil Nacht.