We've lost a wonderful writer: Sir Terry Pratchett, author of the Discworld comic fantasy series of novels, has died aged 66. Publishers Transworld announced the news “with immeasurable sadness”. Managing director Larry Finlay, said: “The world has lost one of its brightest, sharpest minds.” The author of more than 70 books died at his home “with his cat sleeping on his bed, surrounded by his family” earlier on Thursday. Pratchett, who had early onset Alzheimer’s disease, leaves his wife, Lyn, and their daughter, Rhianna. He had, said Finlay “enriched the planet like few before him”. “All who read him know, Discworld was his vehicle to satirise this world: he did so brilliantly, with great skill, enormous humour and constant invention”. “Terry faced his Alzheimer’s disease (an ‘embuggerance’, as he called it), publicly and bravely.