diff --git a/readme.org b/readme.org
index 2fc8fc0..cd9c67a 100644
--- a/readme.org
+++ b/readme.org
@@ -97,6 +97,11 @@ unlocked because it is impossible to find enough money to
 pay for a key. Future versions will hopefully catch more
 problems, but never all of them in complex books.
 
+Run *checkgamebook.py -v* for verbose mode. Currently that just
+means that all ending (death?) sections of the book are printed,
+allowing you to manually check that there are no unexpected
+dead-ends.
+
 ** Number Map Files
 Whenever formatgamebook.py runs it looks for a file with the same
 name as the output file, but with a .map suffix (eg output.map if
diff --git a/todo.org b/todo.org
index 47af07b..5c9e2ab 100644
--- a/todo.org
+++ b/todo.org
@@ -1,4 +1,4 @@
-* TODO [64/92] [69%]
+* TODO [64/93] [68%]
 ** DONE Debug output
 ** DONE DOT output
 ** DONE LaTeX output
@@ -181,3 +181,7 @@ listed even if it is not tagged.
     or treat as any other missing section otherwise.
 ** TODO checkgamebook.py ignore dummy and fake sections
 ** TODO checkgamebook.py trace items to find sections they are needed but can not have been found
+** TODO tag to generate checkgamebook.py warnings
+   Some tag that can be set on incomplete sections to trigger warnings
+   as a reminder that the book is not done yet, and show you what
+   sections remain to be written.