A must for all Terry Pratchett aficionados, this darkly whimsical, fully illustrated, four-color "picture book for adults" is a companion volume to Terry Pratchett's Discworld novel, THUD At six o'clock every night, without fail, Commander Sam Vimes of the City Watch must go home to read Where's My Cow?, with all the right farmyard animal noises, to his little boy. It is the only thing that keeps him sane in an increasingly...