Scrolex

Scrolex puts pages side by side, so you scroll left and right through a
document instead of up and down. On a wide screen this shows several
pages at once without wasted space.

It opens PDF, EPUB, MOBI, FictionBook, XPS and comic book (CBZ) files.

Other features:

- Margin cropping, to fit more content on screen
- Hue-preserving dark mode that stays enabled across sessions
- Zoom with Ctrl+scroll or touchpad pinch gestures
- Full text search
- Table of contents to jump between sections
- One page per scroll wheel step, or keyboard navigation
- Sharp rendering on HiDPI displays
- Runs on both Wayland and X11