diff --git a/manuscript/book.txt b/manuscript/book.txt
index 815237b..fe79408 100644
--- a/manuscript/book.txt
+++ b/manuscript/book.txt
@@ -4,3 +4,4 @@ CHANGELOG.md
 whoami.md
 
 sections/ha-docker-swarm.md
+ha-docker-swarm/design.md
\ No newline at end of file