泰瑞·普莱契

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 …

Strata is a science fiction novel by Terry Pratchett. Published in 1981, it is one of Pratchett's first novels and one of only two purely science fiction novels he has written, the other being The Dark Side of the Sun. Although it takes place in a different fictional universe and is more science fiction than fantasy, …