The action of VALIS is set firmly in the American popular culture of its time, with references to the Grateful Dead, Frank Zappa and Linda Ronstadt as well as the fictional rock musicians Eric Lampton and Brent Mini.
The Black Iron Prison is a concept of an all-pervasive system of social control postulated in the Tractates Cryptica Scriptura, a summary of an unpublished Gnostic exegesis included in VALIS.