BOOK FOUR: CORVETTES, AMULETS, AND SUSPECTS

Swooping low toward the sidewalk, I said my levitation spell into the wind. "Light, lighter, lightest. My arms are now featherweight. High, higher, highest. My body and spirit shall now levitate."

A pocket of air an inch above the sidewalk caught me and my broom. I had about twenty-four times that inch before the bookmobile crashed into the store, but that number was lessening.

I jumped upright, putting myself between the ...