What is the author's style in Mort by Terry Pratchett?

An impersonal, but thoroughly bemused and opinionated, narrator tells the story of Mort in the third person omniscient with frequent extended runs of lively first person dialogue interspersed. The narrator seems to be aware that the twentieth-century earthbound reader has much to learn about flat, magical Discworld and Death's domain, a separate dimension between which Death and select minions can travel instantaneously.