The introduction disclaims any personal views held by the author, "The opinions and philosophies expressed by the characters are not my own, except by coincidence in a few spots not worth mentioning.

The main character, the Avatar, defines God as primordial matter (like quarks and leptons) and the law of probability.

He proposes that God is currently reassembling himself through the continuing formation of a collective intelligence in the form of the human race, modern examples of which include the development of the internet; this is related to the idea of the Omega Point.

In the introduction, Adams describes God's Debris as a thought experiment, challenging readers to differentiate its scientifically accepted theories from "creative baloney designed to sound true" and to "[t]ry to figure out what's wrong with the simplest explanation".

[4] In 2023, Adams announced in a pinned tweet that he had re-published the book for free for his subscribers, and would shortly publish an AI-voiced audiobook version.