Pratchett's Discworld novel number five – Sourcery – features again Rincewind and (my favorite) Death, together with his three fellow horse-riders of the Apocralypse, the apocryphal apocalypse.
The story is nice and everything. It's just apt to kill some time on a train trip. The most remarkable thing about this novel, however, is Pratchett's extensive use of footnotes. There are 25 footnotes in total. There were some footnotes in his earlier novels, too. Yet, here he really establishes the footnote in his work as a literary device that provides a departure from the main narrative, tells a different story altogether, and provides meta-commentaries on the plot – a comic relief from an already comic novel.