Bookmark changed to Bookmarks between chapter 4 and 5

[Bad Dog]

Greetings,

To save others the trouble.
In case you didn't notice on page 60, when you update the model, the
text has you changing the bookmark(s) object form Bookmark to
Bookmarks.

This means, that the other files will also need to change from
referring to
Bookmark -> Bookmarks

Hope this saved you some time...
-Bill