Barnes and Noble's rumored dual-screen e-book reader gained credibility Monday night with the leak of a paper ad in advance (subscription required). A full-page placement due for the New York Times' Book Review next Sunday labels the reader as the Nook and says it will ship for $259, reaching the same price as the US Kindle. It also makes a direct reference to the previously leaked e-book lending feature, which would let users temporarily give rights to a book to someone else.
