Bill Gates: The Microsoft chairman and Bill and Melinda Gates Foundation co-chairman will discuss his life and work with Larry Mantle, host of KPCC's "AirTalk." Bridges Auditorium, Claremont College, 450 N. College Way, Claremont. 5 p.m. Free. (909) 607-0713.
Ivana Lowell: The author of "Why Not Say What Happened?" will present and sign her new memoir. Vroman's Bookstore, 695 E. Colorado Blvd., Pasadena. 7 p.m. Free. (626) 449-5320.
Walter Mosley: The author will read and sign his latest Leonid McGill Mystery, "When the Thrill Is Gone." Eso Won Books, 4331 Degnan Blvd., L.A. 7 p.m. Free. (323) 290-1048.
Jayne Anne Phillips: The author of story collections "Fast Lanes" and "Black Tickets" and novels "MotherKind" and "Lark and Termite" will read and discuss her work. Hammer Museum, 10899 Wilshire Blvd, Los Angeles. 7 p.m. Free. (310) 443-7000.
Ralph Sassone: Host Michael Silverblatt will interview the author of "The Intimates." Bookworm, 89.9 KCRW-FM, 2:30 p.m. http://www.kcrw.com.
Michiel Schwarz & Joost Elffers: The authors of "Sustainism Is the New Modernism" will discuss and sign their new book. Book Soup, 8818 W. Sunset Blvd., West Hollywood. 7 p.m. Free. (310) 659-3110.
Jordan Flaherty: The author of "Floodlines: Community and Resistance from Katrina to the Jena Six" will present and sign his new book. Eso Won Books, 4331 Degnan Blvd., L.A. 7 p.m. Free. (323) 290-1048.
Meredith Baxter: The actress, best known for her work on the show "Family Ties," will present and sign her new book, "Untied: A Memoir of Family, Fame and Floundering." Vroman's Bookstore, 695 E. Colorado Blvd., Pasadena. 4 p.m. Free. (626) 449-5320.
Steve Lopez: The Times columnist will discuss and sign his new book, "Dreams and Schemes: My Decade of Fun in the Sun." Apostrophe Books, 4712 E. 2nd St., Long Beach. 3 p.m. Free. (526) 438-7950.
Mike Young and Jamie Iredell: The authors of "Look! Look! Feathers" and "The Book of Freaks," respectively, will read and sign their new books. Skylight Books, 1818 N. Vermont Ave., L.A. 5 p.m. Free. (323) 660-1175.