Terry Pratchett has died at the age of 66.
The author passed away in his home today, with his cat sleeping on his bed and surrounded by his family.
The news, which was announced on twitter, comes after his long battle with Alzheimer's
Larry Finlay, MD at Transworld Publishers, said: "The world has lost one of its brightest, sharpest minds.
"In over 70 books, Terry enriched the planet like few before him. As all who read him know, Discworld was his vehicle to satirize 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. Over the last few years, it was his writing that sustained him. His legacy will endure for decades to come.
"My sympathies go out to Terry's wife Lyn, their daughter Rhianna, to his close friend Rob Wilkins, and to all closest to him."
Diagnosed with in 2007, Pratchett battled the disease with "his trademark determination and creativity", said Mr Finlay.
He continued to write and completed his last book, a new Discworld novel, in the summer of 2014, before succumbing to the final stages of the disease.
Terry took Death’s arm and followed him through the doors and on to the black desert under the endless night.— Terry Pratchett (@terryandrob) March 12, 2015
The End.— Terry Pratchett (@terryandrob) March 12, 2015