diff --git a/.gitignore b/.gitignore
index 7f7bc64..e78ef2d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,5 +2,6 @@
 /ddd-reference-styles.yml
 /ddd-reference.ref
 /ddd-reference.toc
+/ddd-reference.idx
 /embedded/
 /ddd-reference.pdf
diff --git a/.resilient-version b/.resilient-version
index 1809198..ee74734 100644
--- a/.resilient-version
+++ b/.resilient-version
@@ -1 +1 @@
-3.4.0
+4.1.0
diff --git a/03-putting-the-model-to-work.dj b/03-putting-the-model-to-work.dj
index 5f93587..edf95fa 100644
--- a/03-putting-the-model-to-work.dj
+++ b/03-putting-the-model-to-work.dj
@@ -1,7 +1,5 @@
 # Putting the Model to Work
 
-`\set-counter[id=folio,value=1,display=arabic]`{=sile}
-
 [^:therefore:]: *∴*{custom-style="center"}
 
 Domain-Driven Design is an approach to the development of complex software in
diff --git a/ddd-reference.silm b/ddd-reference.silm
index 5c05373..3fa68e5 100644
--- a/ddd-reference.silm
+++ b/ddd-reference.silm
@@ -11,19 +11,18 @@ metadata:
     To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
 book:
   enabled: true
-sile:
-  packages:
-    - resilient.fancytoc
-  options:
-    papersize: a4
-chapters:
-  - frontmatter.sil
-  - 00-acknowledgements.dj
-  - 01-definitions.dj
-  - 02-pattern-language-overview.sil
-  - 03-putting-the-model-to-work.dj
-  - 04-building-blocks-of-a-model-driven-design.dj
-  - 05-supple-design.dj
-  - 06-context-mapping-for-strategic-design.dj
-  - 07-distillation-for-strategic-design.dj
-  - 08-large-scale-structure-for-strategic-design.dj
+content:
+  frontmatter:
+    chapters:
+      - frontmatter.dj
+      - 00-acknowledgements.dj
+      - 01-definitions.dj
+      - 02-pattern-language-overview.sil
+  mainmatter:
+    chapters:
+      - 03-putting-the-model-to-work.dj
+      - 04-building-blocks-of-a-model-driven-design.dj
+      - 05-supple-design.dj
+      - 06-context-mapping-for-strategic-design.dj
+      - 07-distillation-for-strategic-design.dj
+      - 08-large-scale-structure-for-strategic-design.dj
diff --git a/frontmatter.dj b/frontmatter.dj
new file mode 100644
index 0000000..3dde252
--- /dev/null
+++ b/frontmatter.dj
@@ -0,0 +1,9 @@
+
+{.unnumbered .notoc}
+# Contents
+
+``` =sile
+\noheaders
+```
+
+:_FANCYTOC_:
diff --git a/frontmatter.sil b/frontmatter.sil
deleted file mode 100644
index 1cbe88e..0000000
--- a/frontmatter.sil
+++ /dev/null
@@ -1,5 +0,0 @@
-\set-counter[id=folio,value=4,display=roman]
-
-\chapter[numbering=false, toc=false]{Contents}
-\noheaders
-\fancytableofcontents