Vroom Valley? That was where the trolls ambushed the dwarfs, or the dwarfs ambushed the trolls. It was very far away. It was a long time ago. But if he doesnâ€TMt solve the murder of just one dwarf, Command Sam Vimes of Ankh-Morpork City Watch is going to see it fought again, right outside his office. With his beloved Watch crumbling around him and his war-drums sounding, he must unravel every clue, outwit every assassin and brave any darkness to find the solution. And darkness is following him. Oh . . . and at six oâ€TMclock every day, without fail, with no excuses, he must go home to read Whereâ€TMs My Cow?, with all the right farmyard noises, to his little boy. There are some things you have to do!