diff --git a/book.asciidoc b/book.asciidoc
index a1e26818..8ca86b47 100644
--- a/book.asciidoc
+++ b/book.asciidoc
@@ -1,10 +1,9 @@
-:bookseries: basic
+:bookseries: safari
 
-Mastering Bitcoin
-==========
+= Mastering Bitcoin
 
 include::preface.asciidoc[]
 
-include::Introduction.asciidoc[]
-
+include::colo.asciidoc[]
 
+include::Introduction.asciidoc[]
\ No newline at end of file