diff --git a/servers/media-core/grimmory/README.md b/servers/media-core/grimmory/README.md
index 2422138..f489c5b 100644
--- a/servers/media-core/grimmory/README.md
+++ b/servers/media-core/grimmory/README.md
@@ -1,7 +1,8 @@
 # Grimmory on media-core
 
 - LAN URL: `http://192.168.50.46:6060`
-- Clean library projection: `/mnt/truenas/multimedia/grimmory/library` -> `/books` (read-only)
+- Legacy evaluation library: `/mnt/truenas/multimedia/books` -> `/books` (read-only)
+- Clean library projection: `/mnt/truenas/multimedia/grimmory/library` -> `/books-clean` (read-only)
 - BookDrop: `/mnt/truenas/multimedia/grimmory/staging` -> `/bookdrop`
 - Catalog snapshots and review reports: `/mnt/truenas/multimedia/grimmory/manifests`
 - Rebuild state: `/opt/media-core/appdata/grimmory-rebuild/catalog.sqlite3`
@@ -15,7 +16,12 @@ materialized Work -> Edition -> Asset projection. Only Grimmory's dedicated
 BookDrop is writable. Do not enable file rename, move, delete, or metadata
 write-back against `/books` during the evaluation.
 
-Create the first library at container path `/books`. Set
+Keep the existing `Main Library` at `/books` until the clean projection has
+been accepted. Create a second library at `/books-clean` with organization
+mode `Book Per Folder`, metadata source `Prefer Sidecar`, and folder watching
+disabled. Organization mode is immutable after library creation.
+
+Set
 `GRIMMORY_DB_PASSWORD` and `GRIMMORY_DB_ROOT_PASSWORD` only in the Arcane
 project environment; do not commit their values.
 
diff --git a/servers/media-core/grimmory/compose.yaml b/servers/media-core/grimmory/compose.yaml
index 8dae265..78fd28b 100644
--- a/servers/media-core/grimmory/compose.yaml
+++ b/servers/media-core/grimmory/compose.yaml
@@ -31,11 +31,17 @@ services:
         bind:
           create_host_path: false
       - type: bind
-        source: /mnt/truenas/multimedia/grimmory/library
+        source: /mnt/truenas/multimedia/books
         target: /books
         read_only: true
         bind:
           create_host_path: false
+      - type: bind
+        source: /mnt/truenas/multimedia/grimmory/library
+        target: /books-clean
+        read_only: true
+        bind:
+          create_host_path: false
       - type: bind
         source: /mnt/truenas/multimedia/grimmory/staging
         target: /bookdrop