Granny Weatherwax looked out at the multi-layered, silvery world.

“Where am I?”

INSIDE THE MIRROR.

“Am I dead?”

THE ANSWER TO THAT, said Death, IS SOMEWHERE BETWEEN NO AND YES.

Esme turned, and a billion figures turned with her.

“When can I get out?”

WHEN YOU FIND THE ONE THAT’S REAL.

“Is this a trick question?”

NO.

Granny looked down at herself.

“This one,” she said.

— Sir Terry Pratchett, Witches Abroad