diff --git a/TODO b/TODO
index 8c343f0..558ad9b 100644
--- a/TODO
+++ b/TODO
@@ -1,4 +1,8 @@
 TODO:
+    * consider how to do ISBN properly?
+
+    * add a per-book, get-book and store it in storage/books/<author>/<book>
+
     * search on more than title, e.g. author, series, etc.
 
     * if we add a new parent book with sub-books into a series, with parent * book as 'null' sub_book_num, all the sub_books should be added somehow into series - but cant input numbering on parent book, so