Hogfather - bogeyman

She went into the children's bedroom and leaned over as if to tuck Twyla up. Then her hand darted down and under the bed. She grabbed a handful of hair. She pulled.

The bogeyman came out like a cork but before it could get its balance it found itself spread-eagled against the wall with one arm behind its back. But it did manage to turn its head, to see Susan's face glaring at it from a few inches away.

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Hogfather - p74