diff --git a/book.asciidoc b/book.asciidoc
index 3b87957d..b25327b4 100644
--- a/book.asciidoc
+++ b/book.asciidoc
@@ -2,6 +2,8 @@
 
 = Mastering Bitcoin
 
+include::preface.asciidoc[]
+
 include::ch00.asciidoc[]
 
 include::ch01.asciidoc[]