“There is a fury to Terry Pratchett’s writing: it’s the fury that was the engine that powered Discworld. It’s also the anger at the headmaster who would decide that six-year-old Terry Pratchett would never be smart enough for the 11-plus; anger at pompous critics, and at those who think serious is the opposite of funny; anger at his early American publishers who could not bring his books out successfully. The anger is always there, an engine that drives. By the time Terry learned he had a rare, early onset form of Alzheimer’s, the targets of his fury changed: he was angry with his brain and his genetics and, more than these, furious at a country that would not permit him (or others in a similarly intolerable situation) to choose the manner and the time of their passing.”