diff --git a/book/SUMMARY.md b/book/SUMMARY.md
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--- a/book/SUMMARY.md
+++ b/book/SUMMARY.md
@@ -1,3 +1,4 @@
 # Summary
 
 * [Introduction](./introduction.md)
+* [Code of conduct](./code-of-conduct.md)
diff --git a/book/code-of-conduct.md b/book/code-of-conduct.md
new file mode 100644
index 00000000..80239ce9
--- /dev/null
+++ b/book/code-of-conduct.md
@@ -0,0 +1,12 @@
+# Code of conduct
+
+We follow the [Rust Code of Conduct][rust-coc] with some extra points:
+
+* In the absence of evidence to suggest otherwise, assume good faith when
+  engaging with others
+* Moderation actions may be taken for behavior observed outside of
+  project-specific spaces
+* We have limited patience, so violations may skip the warning and directly
+  result in a ban
+
+[rust-coc]: https://www.rust-lang.org/policies/code-of-conduct