update readme

diff --git a/README.md b/README.md
index da3f59c..aa62d55 100644 (file)
--- a/README.md
+++ b/README.md
@@ -1,3 +1,8 @@
 # Ansible: Up and Running code samples
 
-This repository contains code samples from [Ansible: Up and Running](http://ansiblebook.com), organized by book chapter.
+This repository contains code samples from [Ansible: Up and
+Running](http://ansiblebook.com), organized by book chapter.
+
+Note that most chapters have a single subdirectory named *playbooks*. I did this
+so that the directory structure of the code would match the directory structure
+in the book, since the book always assumes a playbooks directory.