'You might have missed something,' said Ponder.

'No, I say you, you say we,' said Rincewind.

They both stared at the globe.

'Look, it's like having a pot plant,' said Ponder. 'If it has greenfly, you try to squash them.'

'I never do that,' said Rincewind. 'Greenfly may be small, but there's a lot of them ...'

'It was a metaphor, Rincewind,' said Ponder, wearily.

'... I mean, supposing they decide to gang up?'

'Rincewind, you are the only other person here who knows anything at all about Roundworld.

You will come with us or ... or ... I'll tell the Archchancellor about the seven buckets.'

'How do you know about the seven buckets?'

'And I'll explain to him how all of your jobs could easily be done by a simple set of instructions for Hex, too. It'd take me about, oh, thirty seconds. Let's see ...

# Rincewind SUB WAIT

WAIT

RETURN

Or possibly RUN RINCEWIND'

'You wouldn't do that!' said Rincewind. 'Would you?'

'Certainly. Now, are you coming? Oh, and bring the Luggage.'

Knowledge = power = energy = matter = mass, and on that simple equation rests the whole of L- space. It is via L-space that all books are connected (quoting the ones before them, and influencing the ones that come after). But there is no time in L-space. Nor is there, strictly speaking, any space. Nevertheless, L-space is infinitely large and connects all libraries, everywhere and everywhen. It's never further than the other side of the bookshelf, yet only the most senior and respected librarians know the way in.

From inside, L-space looked to Rincewind like a library designed by someone who did not have to worry about time, budget, strength of materials or physics. There are some laws, though, that are coded into the very nature of the universe, and one is: There Is Never Enough Shelf Space.11