How to view comments on the bottom right hand side under the cover ?

In one of the earlier versions, I used to see some sort of comments etc details of the book on the bottom right hand side under the cover.

After updating to the newer versions that preview has disappeared due to perhaps my settings I am not sure

If possible how can I bring it back please

here's a sample I have marked as "book details comments etc"
in a mock up screenshot

http://i.imgur.com/riofG.jpg



So I am not talking about the edit meta data view
I am after the book listing on the left and book cover and comment details view on the right please