Barnes & Noble’s shares rose $1.50 in Wednesday trading, gaining over 14 percent. In an SEC filing, the company said “it expects to make an announcement on May 24 regarding the launch of a new eReader device.” The company reportedly shared the same news during the day in a meeting with analysts, which is likely to have driven the stock’s gains. BN’s choice of date is no accident: the 24th is also BEA’s opening floor day, which means BN clearly intends its e-reader announcement to be the news of the fair.