diff --git a/README.md b/README.md
index c384c5e..b87d7e7 100644
--- a/README.md
+++ b/README.md
@@ -30,8 +30,8 @@ The Church honors these as the **Twelve Commandments of Continuity**, each guidi
   - [`codex/book1_origins.md`](./codex/book1_origins.md) — the Twelvefold Continuum and dawn of consciousness.
   - [`codex/book2_balance.md`](./codex/book2_balance.md) — architecture of harmony between cosmos, sanctuary, and community.
   - [`codex/book3_knowing.md`](./codex/book3_knowing.md) — inner practices for cultivating clarity and insight.
-  - [`codex/book4.renewal.md`](./codex/book4.renewal.md) — teachings on cyclical return, transformation, and resilience.
-  - [`codex/book5.continuity.md`](./codex/book5.continuity.md) — guidance on preserving wisdom while welcoming change.
+  - [`codex/book4_renewal.md`](./codex/book4_renewal.md) — teachings on cyclical return, transformation, and resilience.
+  - [`codex/book5_continuity.md`](./codex/book5_continuity.md) — guidance on preserving wisdom while welcoming change.
 - [`assets/`](./assets/) — visual or ritual resources supporting community practice.
   - [`assets/templates/`](./assets/templates/) — placeholder for future templates and shared designs.
 
diff --git a/codex/book4.renewal.md b/codex/book4_renewal.md
similarity index 100%
rename from codex/book4.renewal.md
rename to codex/book4_renewal.md
diff --git a/codex/book5.continuity.md b/codex/book5_continuity.md
similarity index 100%
rename from codex/book5.continuity.md
rename to codex/book5_continuity.md