This ebook reading software is made to provide a 'paper book' experience on the computer screen: For a start, you get two pages side-by-side instead of just one page in the middle of the screen. (Although you can press '1' or '2' to switch between double and single page mode) Next, the pages turn when you click them, just like a real book. Finally, you can also select a textured background to make the pages look like real paper. yBook will read html files, text files, rtf files and pdb/prc files (Palm document format).