Thorium Reader is a cross-platform and open source eBook reader application
Do you read eBooks on your computer? If you're bored with your current eBook reader program and want a new one, you maybe interested in Thorium Reader.
The open source program is user-friendly, and supports a variety of formats; EPUB, EPUB3, PDF, ZIP, LPF, Audiobook, Webpub, LCPA, LCPDF, LCPL, Divina, Daisy and OPF.
Thorium Reader's interface couldn't be simpler, it has two tabs. The My Books tab, is your eBook library. To add your books from the start page of the app, you can either use the + button to browse, or drag and drop an eBook onto the interface.
Once you have imported the books to the program's library, they are listed on the home page. Only the recently added books are listed here, switch to the All Books section to browse your entire library. Thorium Reader displays the title, author name, and cover of the books. Hit the three-dot button to delete or export a book, the about section displays the eBook's description, cover, publisher info. It also allows you to add tags.
Use the Search bar to find a book. Toggle the view between grid (thumbnail) view and list view using the buttons next to the search bar. Switch to the Catalogs tab in Thorium Reader. You may add an OPDS feed (Open Publication Distribution System) from online services, or your own server, and browse the catalog. I tried it with some Atom feeds, and it works pretty well.
Click on a book's cover to start reading it. Thorium Reader has a toolbar at the top with some useful shortcuts. The back arrow button closes the current book and returns the focus to the bookshelf. To view both the book and the library at the same time, click the 3rd icon. The speaker icon toggles the text-to-speech mode, which uses the system's voice accessibility options (Microsoft David and Zira). The book icon lets you view the contents, chapters, and also the bookmarks that you added.
Use the arrow buttons/bar at the bottom or the right and left arrow keys to navigate between pages. The buttons toward the right edge of the toolbar are options you commonly find in most reader apps. The search icon is useful for finding content in the book page, that can come in handy if you want to jump to a specific section. Bookmark a page, and you can pick up where you left off.
Thorium Reader has three themes Neutral (Light), Sepia, and Night, which you can access from the aa menu > theme. Adjust the font size, type, page layout, alignment, columns, and the spacing settings for margin, word, letter, paragraph and line, from the aa menu. The last option on the toolbar toggles the full screen reading mode. The program supports many keyboard shortcuts, e.g. Ctrl + B toggles the bookmark, Ctrl + F11 jumps to full screen mode, etc. You can find the full list of hotkeys under the settings.
Looking for a comic book reader? You may want to check out YACReader.