Time is a resource. Everyone knows it has to be managed. You mess with it at your peril. You can let it move fast or slowly but what you mustn't do is allow it to stop.
On the Discworld time management is the job of the Monks of History, who store it and pump it from the places where it's wasted (like the underwater - how much time does a codfish need?) to places like cities, where there's never enough time.
But the construction of the world's first truly accurate clock starts a race against, well, time for Lu Tze and his apprentice Lobsang Ludd. Because it will stop time. And when time stands still, everything stops with it. Then, there really is no future.
Terry Pratchett was the acclaimed creator of the global bestselling Discworld series, the first of which, The Colour of Magic, was published in 1983. In all, he was the author of over fifty bestselling books. His novels have been widely adapted for stage and screen, and he was the winner of multiple prizes, including the Carnegie Medal, as well as being awarded a knighthood for services to literature. He died in March 2015.