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Complimentary download of Jack Who? by Lisa Gillis.
This is an epub file. Nook and most e-readers will accept and open an epub file. Also, there are many free epub reader apps in your devices app store.
Kindle is one of the only e-readers to not accept an epub, but epubs can be converted! To read on a Kindle, the file will need to be converted to a .mobi or .pdf and then uploaded or emailed to a Kindle reader. There are many epub converters including Calibre (which is also a reader).