Sourcery

A sourcerer is born in Discworld: a wizard so powerful that he makes all other magicians look like a bunch of fools in pointy hats. Now, suddenly, Discworld is brought to the brink of an all-out thaumaturgical war. The only hope for peace is Rincewind, the failed magician who has a risky plan to save the world. He enlists the help of several odd new characters, including Conina the barbarian hairdresser, Nijel the Destroyer, and a yuppie genie who sees lamps as a growth industry. This is the fifth book in the Discworld series.