FBReader

FBReader - (Favorite Book Reader) works on computers with all major operating systems and mobile devices.

Features:

• Comfortable reading. Customizable text styles and colors for day and night modes, advanced navigation features, and bookmarks.
• Configurable network book sources list, from which you can download books for free and for a fee. You also can open your local books or add your preferred OPDS catalogs. FBReader provides a powerful catalogs browser, with browsing history, bookmarks, and search.
• Transparent cloud integration. FBReader synchronizes your books, reading positions and bookmarks across all your devices. Start reading a book on your computer, then continue from the same place on a tablet or smartphone.