'Upgrade' to a Nook, get 30 free e-books - CNET

'Upgrade' to a Nook, get 30 free e-books - CNET: CNET 'Upgrade' to a Nook, get 30 free e-books CNET by Don Reisinger Barnes & Noble is using free e-books to entice current e-reader owners to also buy…

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