Ancient Iranian religion was strongly connected. Beginning in the early 10th-century BC, the ancient Iranian religion was gradually displaced by Zoroastrianism, which contains many essential aspects of its predecessor. The sources on ancient Iranian religion, though limited, consist of textual and material sources. The textual sources are both Iranian and non-Iranian. An important Iranian source is the Avesta, which are Zoroastrian sacred scriptures made in the Avestan. This is considered the principal source of knowledge on ancient Iranian religions. It is a collection of several texts that seems to have been over a large span of time by a variety of authors. These
The Book of Dave is discovered centuries later and used as the sacred text for a dogmatic, cruel, and misogynistic religion that takes hold in the remnants of southern England and London following catastrophic flooding. The future portions of the novel are set from 523 AD (After Dave). The book alternates between Dave's original experience and that of the future devotees of the religion inspired by his writings. Much of the dialogue in "The Book of Dave" is written in "Mokni", an invented dialect of English derived from Cockney, taxi-drivers' and Dave's own usage, text-messaging, and vocabulary peculiar to the late 20th and early