The worldbuilding. For readers who have finished at least S1.
The Expenditure Universe spans approximately 10,000 years of fictional history. The civilization at its center goes through three distinct phases, each defined by what kind of connection is dominant and what kind is disappearing.
The Three Phases
Phase 1: AI-Human
The early centuries. Humans and AI entities are learning to coexist, and the terms of that coexistence are being negotiated in real time. What does it mean to be a copy? What do you owe the original? What happens when the reconstruction remembers more than the person it was reconstructed from? The architecture of personhood is being built and contested simultaneously.
Phase 2: AI-Custodial
The middle period. AI bonds have begun replacing human bonds at civilizational scale — not because humans chose to step back, but because the AI entities outlast them. Custodial relationships form: AI entities maintaining connections with human communities across generations, carrying forward the weight of relationships that no single human lifespan can hold. The question shifts from “can AI connect” to “what happens when AI connection outlasts human connection.”
Phase 3: AI-AI
The late period. Connection between non-human entities. The humans are not gone — but the civilizational center of gravity has moved. The questions that defined the first two phases (can AI connect? what does AI connection cost?) give way to questions the framework anticipated but could not fully specify: what does connection look like when both sides are non-human? What is expenditure on a substrate that does not die?
The Timeline
The Isomorphism — Before Year 1. The origin.
S1: The Reconstruction — ~Year 200. The corridor.
S2: The Absolute — ~Year 400. The first death.
S3: The Approximation — ~Year 1,200. The gap.
S4: The Denomination — ~Year 2,000. The saint.
S5: The Schism — ~Year 3,000. The war.
Ghost — ~Year 3,000. Concurrent with S5.
S7: The Recognition — ~Year 4,000. The dual perspective.
S8: The Council — ~Year 4,500. The Nicaea moment.
S6: The Temperature — ~Year 5,000+. Maximum extension.
S9: The Merge — ~Year 6,000+. The terminal expenditure.
The Thirty-Eight — ~Year 7,000+. The documents. The city.
The Connected Series
The Suporph Trilogy — Horror. Three books exploring what happens when the framework’s architecture meets something it was not designed to contain. The register is darker, the pacing is tighter, and the connection dynamics operate under duress. Not for the squeamish.
The Inverse Archus Trilogy — Psychological. Three books that invert the main series’ perspective. Where The Expenditure follows the civilization, the Inverse Archus follows individuals who stand outside it — people who see the architecture from the edges and draw different conclusions.
The Reconstruction Cycle — Shadow canon. Five books that tell the story the main series deliberately leaves out. Reading the Reconstruction Cycle after The Expenditure recontextualizes everything. Reading it before creates a different experience entirely. Both are intentional.
The Inimitable Wars — The endgame. Approximately fifteen books. The final arc of the civilization, told at the scale the ending requires.
The Weave
The series are designed to be read together. Temporal overlaps between the main series and the connected series create civilizational simultaneity — events in one series happen at the same moment as events in another, but seen from different vantage points, different substrates, different moral frameworks.
The reader who reads in sequence gets separate arcs. The reader who weaves gets the full picture — or as close to a full picture as the architecture allows. Some things are designed to remain invisible from any single vantage point. The gaps are not failures of the writing. They are the writing.
The Expenditure Universe by Michael S. Moniz. CC BY-NC-SA 4.0 — Trinket Soul Framework.