Hosts Peter Hartlaub and Heather Knight dive in the San Francisco Bay with "Why We Swim" author Bonnie Tsui, as a warm-up for their Total SF Book Club event on November 17 at the San Francisco Public Library. Tsui talks about an Icelandic legend who survived a frigid multi-hour swim, why San Francisco is a great swimming city and how newcomers can get started — and maybe work up to their own Bay swim. Hartlaub and Knight also recap their very cold but invigorating swim, including a cameo from former author Daniel Handler. The Total SF Book Club event is set for 6 p.m. on Wednesday, Nov. 17 at the Koret Auditorium at the SFPL main branch, with a virtual option. Register for free here. Produced by Peter Hartlaub. Music is "The Tide Will Rise" by the Sunset Shipwrecks off their album "Community" and cable car bell-ringing by 8-time champion Byron Cobb. Follow Total SF adventures at www.sfchronicle.com/totalsf Learn more about your ad choices. Visit megaphone.fm/adchoices