Manual brightness adjustment (+auto-brightness setting).Accurate multi-line text selection w/ draggable handles.Contents presentation in the form of nested hierarchy.Honored document's CSS styles for EPUB, AZW, AZW3 and MOBI books.Lock page in place to disable accidental dragging.Select fonts for text, titles, italics, etc.Solid and textured backgrounds (work for all formats, even PDF and DjVu).Open folders w/ image assortments as books (bookbinding).Book display sorting: by author(s), genre, series, size, etc.Filtered book search: by title, author, series, genre, etc.Change the size and look of book covers.Night or daytime theme (Substratum friendly).Librera has more than 10 millions download from Google Play Store and other platforms. The developer offers a free version hover, it comes with advertisements, which you can ignore if you use the Pro version. It comes with a long feature-list that makes it unbeatable among other Android eBook readers. Librera Reader is a free, open-source eBook reader and viewer for Android devices.

Librera reader