Title to Be Discussed: Madonnas of Leningrad , by Debra Dean. Date: Thursday, Feb. 23, 1:30pm, in the Earl Elliott Room. Repeated Friday, Feb. 24, 2:30pm, in the Women's Council of Realtors Conference Room. Summary: Bit by bit, the ravages of age are eroding Marina's grip on the everyday. An elderly Russian woman now living in America, she cannot hold on to fresh memories, yet her distant past is miraculously preserved in her mind's eye. Vivid images of her youth arise unbidden, carrying her back to the terrible fall of 1941, when she was a tour guide at the Hermitage Museum in Leningrad. Next month's selection: Blood, Bones and Butter by Gabrielle Hamilton.