This holiday season at Harvard Book Store and harvard.com, shop with us on any of the four Sundays after Thanksgiving; a portion of every purchase will go to support important local organizations. Your purchases will help support 826 Boston, Community Cooks, and On The Rise. The Gives Back program is a way for Harvard Book Store to contribute to local nonprofits during the holidays. On four consecutive Sundays, a percentage of in-store and online sales will go to our selected charitable organizations. 826 Boston is a…