And on Discworld that is the job of the Monks of History, who store it and pump it from the places where it’s wasted (like 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 that will only be the start of everyone’s problems.