diff --git a/book/404.html b/book/404.html
index d3309cc..e16342b 100644
--- a/book/404.html
+++ b/book/404.html
@@ -97,7 +97,7 @@
diff --git a/book/API.html b/book/API.html
index 491714f..1de8e12 100644
--- a/book/API.html
+++ b/book/API.html
@@ -95,7 +95,7 @@
diff --git a/book/chapter_1.html b/book/Hole.html
similarity index 94%
rename from book/chapter_1.html
rename to book/Hole.html
index 8b61124..5ee3b7f 100644
--- a/book/chapter_1.html
+++ b/book/Hole.html
@@ -95,7 +95,7 @@
@@ -163,7 +163,7 @@
-
+
diff --git a/book/Message-flow.html b/book/Message-flow.html
index 9d860d5..ae4062c 100644
--- a/book/Message-flow.html
+++ b/book/Message-flow.html
@@ -95,7 +95,7 @@
@@ -174,7 +174,7 @@