Originally Posted by jswinden
For some books, but not all, Borders/KoboBooks stores have an Adobe ePub version which you can download to your PC/Mac and sideload onto readers that can view Adobe Digital Edition (ADE) style ePubs. Your reader has to have an ADE registration though, but this is easy to get/accomplish.
Actually, the Kobo books that are available in ePub can be added to a Sony reader using the Kobo Desktop software. I sync my PRS-950 with the Kobo software all the time, since that's so much easier than going through the extra steps of adding them through Calibre.