FLATEOTM, Sept 2003: John Le Carre Edition
It is now known to science that there are many more dimensions than the classical four. Scientists say that these don’t normally impinge on the world because the extra dimensions are very small and curve in on themselves, and that since reality is fractal most of it is tucked inside itself. This means either that the universe is more full of wonders than we can hope to understand or, more probably, that scientists make things up as they go along.
– Terry Pratchett
Oh, and the book: Tinker Tailor Soldier Spy