VALIS Trilogy

The VALIS trilogy is a "trilogy" of science fiction 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by author Philip K. Dick which include VALIS (1978), The Divine Invasion (1980), and The Owl in Daylight (unfinished/unpublished).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. The Transmigration of Timothy Archer was posthumously substituted for the unfinished The Owl in Daylight as the third novel in the "trilogy."