Foliate is a free and open-source eBook reader that supports EPUB, Mobipocket, Kindle, FictionBook, and comic book archive formats.
It comes with multiple features including but not limited to highlighting, note-taking, and multiple themes (including gruvbox, sepia, and solarized).
Users can install Foliate with the following command:
emerge --ask app-text/foliate
The app-text/foliate package can then be run using the following binary/command: