“Viral Hate.” Christopher Wolf will discuss his book, co-authored with ADL director Abraham Foxman, about the spread of hate on the Internet. At Books Inc., 1760 Fourth St., Berkeley. 7 p.m. Free. www.booksinc.net.
“Climbing the Sacred Ladder: Your Path to Love, Joy, Peace and Purpose.” Book launch with author Shulamit Sofia. At Jewish Community Library, 1835 Ellis St., S.F. 1 p.m. Free. www.jewishlearningworks.org/library.
“Overweight Sensation: The Life and Comedy of Allan Sherman.” Author Mark Cohen talks about the song parodist most famous for “Hello Muddah, Hello Fadduh.” At Jewish Community Library, 1835 Ellis St., S.F. 7 p.m. Free. www.jewishlearningworks.org/library.