Rabbi David Wolpe. The spiritual leader of Sinai Temple in Los Angeles talks about his new book, “David: The Divided Heart,” examining the biblical king. Part of Jewish LearningWorks’ One Bay One Book program. At Jewish Community Library, 1835 Ellis St., S.F. 4 p.m. Free. RSVP requested.

“Celebration of Jewish Authors: The Sciences.” Presentations by Jewish science writers including Arthur Allen (“The Fantastic Laboratory of Dr. Weigl”) and Stuart Rojstaczer (“The Mathematician’s Shiva”). Books will be for sale. At Peninsula JCC, 800 Foster Blvd., Foster City. 12:30 to 5 p.m. Free.