At 63, Pratchett — who has been diagnosed with early-onset Alzheimer's — speaks openly about causing his own death. "I believe everyone should have a good death," he tells NPR's Steve Inskeep. "You know, with your grandchildren around you, a bit of sobbing. Because after all, tears are appropriate on a death bed. And you say goodbye to your loved ones, making certain that one of them has been left behind to look after the shop." Pratchett has become an advocate for legalized assisted suicide in Britain, making him one of many voices in a global debate. Many oppose the practice for religious reasons or because they fear a slippery slope to involuntary euthanasia; but Pratchett has turned the legalization of assisted suicide into something of a personal crusade.