The VALIS trilogy is a set of science fiction/philosophical novels by author Philip K. Dick which include VALIS (1978), The Divine Invasion (1980), and The Owl in Daylight (unfinished/unpublished). The "trilogy" may also include Radio Free Albemuth (1985) and The Transmigration of Timothy Archer (1982). Dick's first novel about the VALIS concept originally titled "VALISystem A" (written 1976), was published as Radio Free Albemuth after Dick's death in 1982.