VALIS is a 1981 science fiction novel by Philip K. Dick. The title is an acronym for Vast Active Living Intelligence System, Dick’s gnostic vision of one aspect of God.
VALIS is the first book in the VALIS trilogy of novels including The Divine Invasion (1981), and the unfinished The Owl in Daylight. The Transmigration of Timothy Archer (1982) is thematically related to the unfinished trilogy and was included in several omnibus editions of the trilogy as a stand-in for the unwritten final volume. Together with his thematically related final novel, VALIS represents Dick’s last major work before he died.
Here are the covers from the various editions of Valis that appeared around the world.