Must be different kinds of 'chests' then. I don't think this would have worked as a book stand, lock or no. There is nothing to hold the pages open and no 'rest' so the book would slide right off.
You might like to see my reply to ~
adarhysenthe about the light though:
[link] It's not quite the bonus it looks like, alas.
And unfortunately, the view is nothing to speak of at all either.