Un article de The Independent donnant la parole à Stephen Baxter et Terry Pratchett, à l'occasion de la sortie prochaine du roman qu'ils ont écrit à quatre mains, The Long Earth. Ils reviennent sur cette collaboration. 

Terry's Alzheimer's [he suffers from a rare form that affects the visual part of his brain] has complicated his work in practical ways: he's had to adapt to using voice-recognition software, he needs the support of his PA in going over drafts, and so on. But what's impressed me most is that he has never let this get between him and the books he needs to write.