Hide Library and TOC
The TOC and especially the Library are clutter while reading.
Unlike iTunes, where choosing a new file every few minutes is the norm, a user will typically spend several hours on one file when reading. And jumping between chapters randomly is also not typical usage. (I believe users who do that are using reference books, and they wouldn't be doing that with Bookle because its lack of search makes it entirely unsuited to that purpose.)
It should be possible to hide the Library and TOC. There's as good as zero benefit to having them constantly visible, and they are distractions.
Seems like an entirely reasonable request - we'll look into the best way of doing it.