Toby and the Siege of Sky City in Bloomington, MN

The third book in the award-winning Toby Bean trilogy.
A captured city. A forbidden spell. An offer too tempting to refuse.
The witches and wizards have built a new city in the sky, and thanks to a flying bed, both Toby and his mum can attend the grand opening.
With a fountain of flames and caterwauling panthers, the party is in full swing when the ground quakes beneath their feet. An old enemy with new allies has discovered their secret location and has its sights set on world domination.
Toby must lead the resistance. But he can't do it alone. And with the enemy promising to give his mum the best medical care, is it time for him to join the other side?