Terry Pratchett

Sourcery is the fifth Discworld novel by Terry Pratchett, published in 1988. On the Discworld, sourcerers – wizards who are sources of magic, and thus immensely more powerful than normal wizards – were the main cause of the great mage wars that left areas of the disc uninhabitable. As eight is a powerful magical …

GURPS Discworld and the related supplements are role-playing game sourcebooks set in Terry Pratchett's Discworld fantasy universe using the GURPS role-playing game system.