The upcoming 2.0 release has something that accomplishes this exactly -- you'll have to wait for the release to see how it works, though. ...within a couple of weeks (we hope to release this week and we don't know how long Apple will take to approve it.)
Totally agree, this change would be great.
Totally agree, most of the times that's what I want to do, go back one step, and not to the book level.
Already done in 2.0. You stole my thunder! :)