MONDAY Daniel Gottlieb will be reading from Letters to Sam: A Grandfather’s Lesson on Love, Loss, and the Gifts of Life, which are much happier than his Letters to Comcast: Seriously, When The Hell Are You Guys Going to Have My Internet Hooked Up Because It’s Been Three Weeks For The Love of All that is Holy. Barnes & Noble, 4801 Bethesda Ave., Bethesda., at 7 p.m. TUESDAY Given the manifest inattention to the…