“It’s over, Grosbek!” Kestrel’s voice boomed through the sky.

“Not while I still live,” I cried. “And you die!”

It was a sub-par line - far from my best work - but I had more pressing concerns, like making the drop-off.

My archnemesis Kestrel, the hero of Falcon’s Point, streaking across the sky in his brown and white costume. I braced for his impact in midair, my long cape falling just above the rocket boots which kept me suspended seventy feet into the air.

The sleek...