My Library - list revision dates
Sometimes corrections are made after the first publication of a premium edition.
It's not a big deal to keep re-downloading a book when I want to read it, but it would save a little bit of effort (and bandwidth for both me and JNC) to know whether or not I need to do that and re-copy it to my kindle.
The last-modified time for the blob could be added next to the download button.
Yep, this has been asked multiple times already. I hope it gets included in the next site redesign.