How to find material

The title says it all; how do you find material on this site? The service is full of good lessons. But for example the “book” section on Japanese lessons contains none of the light novels I’ve read on the service. The way I found those was just by coincidence on the lesson feed.

Behind a user name there doesn’t seem to be a page that contains other uploads by that provider. Having that would be a great addition. Only way to find them I have found is to copy paste the user name on the search field of the lesson feeds.

Scrolling through long list of lesson feed can’t really be the method this service is intended to be used. What am I missing? Where is the secret alphabetical list of lessons that can be filtered by type (book, light novel, article, news cast, podcast etc.), and you can filter out lessons already taken.