As previously mentioned, we've been working on expanding the functionality of our MBooks system.
The new interface now allows users to create their own collections of MBooks items and view public collections created by others. Users can also do full text searching across all items within a collection.
So, check it out! MBooks Public Collections Page
We quietly released it last week so we could discover any remaining bugs and (my personal nemesis) browser display problems. We hope we caught them all, but please let us know if you experience any weird behavior. You can contact us via email@example.com or the feedback form linked to from the top of every MBooks page.
And please take a few minutes to fill out our quick survey to help us decide what features to add next.