"The Light Fantastic" by Terry Pratchett is a humorous and satirical fantasy novel, serving as a sequel to "The Colour of Magic." It continues the adventures of Rincewind, the inept wizard, and Twoflower the tourist as they navigate through Discworld, a flat world balanced on the backs of four elephants standing on a giant turtle. The story is filled with absurdity, wit, and imaginative world-building.