you should be able to read any ebook (regardless of where you buy it) on your 505, provided it's in the correct format. for the 505, you can get epub or lrf to read directly. you can also get different formats if one of those is not available, but then you must convert the format yourself (it's very easy to do using calibre for example). note that this will involve removing the drm, which may be illegal in your country. but if you are only doing it for your personal use on a book you have purchased most people agree that there is no harm.
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