diff --git a/exampleSite/content/a-book/ch-0.md b/exampleSite/content/a-book/ch-0.md
new file mode 100644
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+++ b/exampleSite/content/a-book/ch-0.md
@@ -0,0 +1,3 @@
+---
+title: Chapter 0. Preface
+---