diff --git a/roles/calibre/defaults/main.yml b/roles/calibre/defaults/main.yml
index 73ed87fea..b794b0f4b 100644
--- a/roles/calibre/defaults/main.yml
+++ b/roles/calibre/defaults/main.yml
@@ -9,6 +9,9 @@ calibre_dbpath: "{{ content_base }}/calibre"
 
 calibre_userdb: "{{ calibre_dbpath }}/users.sqlite"
 # i.e. /library/calibre/users.sqlite
+# For teachers to add/remove/convert books & edit metadata: Admin/changeme
+# Stub acnts to browse books: box/box, h/h, ht/ht, m/m, mx/mx, p/p, pe/pe
+# Edit with: calibre-server --manage-users --userdb /library/calibre/users.sqlite
 
 calibre_sample_book: "Metamorphosis-jackson.epub"
 # Must be downloadable from http://download.iiab.io/packages