diff --git a/chisel-book.tex b/chisel-book.tex
index c312795..cf404e1 100644
--- a/chisel-book.tex
+++ b/chisel-book.tex
@@ -24,7 +24,7 @@
 
 
 \newif\ifbook
-\booktrue % comment out for the print book version
+%\booktrue % comment out for the print book version
 
 \ifbook
 \else