diff --git a/rulebook/src/SUMMARY.md b/rulebook/src/SUMMARY.md
index 7390c82..c8bd539 100644
--- a/rulebook/src/SUMMARY.md
+++ b/rulebook/src/SUMMARY.md
@@ -1,3 +1,6 @@
 # Summary
 
 - [Chapter 1](./chapter_1.md)
+- [Chapter 2](./chapter_2.md)
+- [Chapter 3](./chapter_3.md)
+
diff --git a/rulebook/src/chapter_1.md b/rulebook/src/chapter_1.md
index b743fda..78ccf44 100644
--- a/rulebook/src/chapter_1.md
+++ b/rulebook/src/chapter_1.md
@@ -1 +1,3 @@
 # Chapter 1
+
+Hello world
diff --git a/rulebook/src/chapter_2.md b/rulebook/src/chapter_2.md
new file mode 100644
index 0000000..7ebb596
--- /dev/null
+++ b/rulebook/src/chapter_2.md
@@ -0,0 +1 @@
+# Chapter 2
diff --git a/rulebook/src/chapter_3.md b/rulebook/src/chapter_3.md
new file mode 100644
index 0000000..10285d6
--- /dev/null
+++ b/rulebook/src/chapter_3.md
@@ -0,0 +1 @@
+# Chapter 3