Verified answer

Most for-purchase books are protected by DRM (Digital Rights Management) systems that are particular to the ereader, so, no, you can't count on being able to transfer B&N ebooks for your Kindle, or Amazon ebooks for your Nook. There are lots of places, however, which offer free ebooks that will work on most ereaders. Sometimes it's a single format that most support (EPUB, TXT, PDF, etc); sometimes multiple ebook formats are listed per book.

The sites listed here have for-purchase ebooks and free ebook downloads:

http://www.howtodecide.com/ebook-download/

Also, if you master a good conversion tool such as Calibre,

http://calibre-ebook.com/

you'll gain access to more formats than just your ereader's native ebook file formats. Calibre will not, however, overcome DRM of protected for-purchase books.

sure,First you ought to eliminate the nook DRM by technique of Epubor nook DRM elimination,and then convert the nook format to be supported by technique of the Kindle,jointly with AZW/Mobi/%TPZ. Calibre can convert any formats ,it really is a freeware!