Multi - million selling writer has ` ` a very rare case of early onset ' 's '' . In a statement titled `` an embuggerance '' on the Web site of Discworld illustrator Paul Kidby , Pratchett says that he has been diagnosed with what he terms `` a very rare form of early onset Alzheimer 's . '' Pratchett says he continues on books , plans to honor commitments . His novels are set in a fantasy universe but depict modern day life . Received the Order of the British Empire from the Prince of Wales in 1998 .
Multi - million selling writer has ` ` a very rare case of early onset ' 's '' . Pratchett says he continues on books , plans to honor commitments . His novels are set in a fantasy universe but depict modern day life . Received the Order of the British Empire from the Prince of Wales in 1998 .