Two-day sale features, books, video, games, items for the whole family Shoppers browse at the 2013 Unionville High School annual used book sale. The 2014 version promises to be even bigger and better than ever, kicking off Friday, Feb. 21. EAST MARLBOROUGH — One of the largest sales of its kind in the northeast is set to return to the Unionville High School gymnasium on Friday evening, Feb. 21, when...