diff --git a/book.md b/book.md
index 28da1ec2b..11e92c2f0 100644
--- a/book.md
+++ b/book.md
@@ -12,6 +12,7 @@ It is currently just this: this note you're reading, and the links you follow in
 - [[In Flancia there is no violence]].
 - [[Caramel city]].
 - [[Against gag orders]].
+- [[Protopoi]].
 - [[On the pedagogy of revolution]].