Hogfather - Realm

'Tell me,' she said. 'Have you ever ridden a horse?'

'I don't know. What's a horse?'

In the depths of the library of Death, a squeaking noise. It was not loud, but it appeared louder than mere decibels would suggest in the furtive, scribbling hush of the books.

Everyone, it is said, has a book inside them. In this library, everyone was inside a book. The squeaking got louder. It had a rhythmical, circular quality. Book on book, shelf on shelf ... and in every one, at the page of the ever-moving now, a scribble of handwriting following the narrative of every life...

The squeaking came round the corner. It was issuing from what looked like a very rickety edifice, several storeys high. It looked rather like a siege tower, open at the sides. At the base, between the wheels, was a pair of geared treadles which moved the whole thing. Susan clung to the railing of the topmost platform.

'Can't you hurry up?' she said. 'We're only at the Bi's at the moment.'

'I've been pedaling for ages!' panted the oh god.

***

Hogfather - p221