Grettings DebT, and welcome
You've sure came to the right place for that
This place is filled with nice people who will answer just about any question about and around e-readers and e-books.
Not to mention the excellent wiki-section that contains just about every little piece of information you could possibly need. And last but not least, all the wonderful books that are available for download that has been assembled by the users of these forums and are available in a number of formats, including lrf which is the preferred format for the SONY prs-505