diff --git a/TODO.otl b/TODO.otl
index f6be99b..708bdd8 100755
--- a/TODO.otl
+++ b/TODO.otl
@@ -227,6 +227,10 @@
 				[_] seporate issue download (secondary)
 	
 [_] 0% Low priority todo
+	[_] look into HPub ebook spec...
+	| https://github.com/Simbul/baker/wiki/hpub-specification
+	| https://github.com/Simbul/baker
+	| http://bakerframework.com/
 	[_] vertically scrollable pages....
 	[_] pages that are wider than the screen (aligned to ribbon)...
 	[_] make pages of different formats work...