diff --git a/book.asciidoc b/book.asciidoc
index 4ee73e54..ef27e03e 100644
--- a/book.asciidoc
+++ b/book.asciidoc
@@ -40,6 +40,6 @@ include::appdx-pycoin.asciidoc[]
 
 include::appdx-bx.asciidoc[]
 
-include::index.asciidoc[]
+include::ix.html[]
 
-include::colo.asciidoc[]
+include::colo.html[]