The Book of the Short Sun (1999–2001) is a series of three science fantasy novels or one three-volume novel by the American author Gene Wolfe. It continues The Book of the Long Sun (1993–1996): they share a narrator and Short Sun recounts a search for Silk, the Long Sun hero. The two works are set in the same universe as The Book of the New Sun series that Wolfe inaugurated in 1980 and the Internet Speculative Fiction Database (ISFDB) catalogs all three as sub-series of the "Solar Cycle", along with some other writings.