"The Nook e-reader was launched in 2009 to compete with Amazon's Kindle, allowing users to buy, download and read digital versions of books and magazines.
Its content will now be available to the growing number of people with mobile devices running Microsoft software."
BBC News - Microsoft invests in Barnes and Noble's Nook e-books
I suspect this may be an age thing. I can't imagine reading a book on a tablet or reader, but no doubt youngsters can't imagine having to pick up an old fashioned book

Or are you a Kindle or digital book convert?