diff --git a/vars/default_vars.yml b/vars/default_vars.yml
index 398b62d03..1cba88745 100644
--- a/vars/default_vars.yml
+++ b/vars/default_vars.yml
@@ -233,10 +233,16 @@ idmgr_enables: False
 # 6-GENERIC-APPS
 
 # Calibre
+
+# WARNING: CALIBRE REQUIRES X WINDOWS / OPENGL LIBRARIES.  Consider installing
+# an OS that includes a GUI (desktop) environment if you need Calibre E-Books.
+
 calibre_install: True
-calibre_enabled: False
+calibre_enabled: True
+# Change calibre_port to 8010 if you're using XO laptops needing above idmgr
 calibre_port: 8080
-calibre_web_path: calibre
+# Change calibre to XYZ add your own mnemonic URL like: http://box/XYZ
+calibre_web_path: calibre  #NEEDS WORK: https://github.com/iiab/iiab/issues/529
 # In addition to: http://box/books box/libros box/livres box/livros box/liv
 
 # DokuWiki