diff --git a/source/chapter1.adoc b/source/chapter1.adoc
index 3b116f0..4792c05 100644
--- a/source/chapter1.adoc
+++ b/source/chapter1.adoc
@@ -1,4 +1,4 @@
-== Chapter 1: The Wonders of Nature
+== The Wonders of Nature
 
 === Introduction
 
diff --git a/source/chapter2.adoc b/source/chapter2.adoc
index 364cdab..fd1fb46 100644
--- a/source/chapter2.adoc
+++ b/source/chapter2.adoc
@@ -1,4 +1,4 @@
-== Chapter 2: Exploring the Ocean
+== Exploring the Ocean
 
 === Introduction
 
diff --git a/source/chapter3.adoc b/source/chapter3.adoc
index f57466c..aaf85e8 100644
--- a/source/chapter3.adoc
+++ b/source/chapter3.adoc
@@ -1,4 +1,4 @@
-== Chapter 3: Exploring Ecosystems
+== Exploring Ecosystems
 
 === Introduction
 
diff --git a/source/chapter4.adoc b/source/chapter4.adoc
index de65373..a9c0d63 100644
--- a/source/chapter4.adoc
+++ b/source/chapter4.adoc
@@ -1,4 +1,4 @@
-== Chapter 4: Mathematics in Nature
+== Mathematics in Nature
 
 === Introduction
 
diff --git a/source/chapter5.adoc b/source/chapter5.adoc
index 8c90e23..8dff31b 100644
--- a/source/chapter5.adoc
+++ b/source/chapter5.adoc
@@ -1,4 +1,4 @@
-== Chapter 5: Programming Fractals
+== Programming Fractals
 
 === Introduction