Yes, you can read your eBooks in landscape mode.
- Please tap into the center of the screen.
- The menu icon will be shown, next tap on the 'Settings' icon.
- Please set to 'Landscape' mode on the 'Orientation' window.
- Voila! enjoy reading!
The above applies for ePub titles. For PDF titles, ensure the 'Auto-rotate' 
function is enabled.