In Unseen Academicals Pratchett looks at foot-the-ball in Ankh-Morpork and its effects on the citizens of the great city. When Patrician Vetinari (personally my favourite character in the Discworld series) decides to allow foot-the-ball he wants the wizards of Unseen University to clean the game up. Through circumstances beyond their control, the wizards also find that they have to put a team together as well. Throw in a dwarf fashion show, Glenda and her pies, the beautiful Juliet, a boy who can kick a tin can like nobodies business and the mysterious Mr Nutt.
Sit back and enjoy the ride.