A Life With Footnotes, by the late author’s former assistant and friend, has been authorised by Pratchett’s estate and is due to be released in September

Rob Wilkins, Terry Pratchett’s former assistant and friend, is writing the official biography of the late Discworld author, which will move from his childhood to the “embuggerance” of the Alzheimer’s disease he was diagnosed with in 2007.

Pratchett was working on his autobiography when he died in 2015, but “following his untimely death from Alzheimer’s disease, the mantle of completing Terry Pratchett’s memoir was passed to Rob”, said publisher Transworld.