Artemis grabbed her shoulders, for once abandoning his shell of icy
composure. “Holly. Holly, speak to me. Your finger. Is it okay?”
Holly wiggled her fingers, then curled them into a fist.
“I think so,” she said, and whacked Artemis right between the eyes.
The surprised boy landed in a snowdrift for the third time that day.
Holly winked at an amazed Butler.
“Now we’re even,” she said.
Commander Root didn’t have many treasured memories. But in
future days, when things were at their grimmest, he would conjure up this
moment and have a quiet chuckle.

-The Arctic Incident, Chapter 9