The Head and the Heart Sub Pop's new darlings have a large cast of players all devoted to big ideas about modern folk, misty indie rock and harmonies that will tug at, well, head and heart alike. Troubadour, 9081 Santa Monica Blvd., West Hollywood. 8 p.m. $15. http://www.troubadour.com.
Robert Plant and Band of Joy Plant had a breakthrough collaborative folk album with Alison Krauss, but here he strikes up his new ensemble to tackle standards and cover songs by unlikely writers (including the minimalist indie band Low). Santa Barbara Bowl, 1122 N. Milpas Ave., Santa Barbara. 7 p.m. $47.50-$67.50. http://www.sbbowl.com.
Meghan O'Rourke The former Slate culture editor and award-winning poet will discuss and sign her moving new memoir, "The Long Goodbye." Lyrical and unswervingly candid, the memoir recounts her profound grief after her mother's death and how she came to terms with the loss. Skylight Books, 1818 N. Vermont Ave., Los Feliz. Free. 7:30 p.m. (323) 660-1175. http://www.skylightbooks.com.
Haskell Wexler Documentary filmmakers have essentially twice the work — how to be a convincing journalist and yet remain a visually evocative filmmaker. The noted cinematographer leads a panel of peers discussing a documentary filmmaker's obligations to truth and beauty alike. Cinefamily, 611 N. Fairfax Ave., L.A. 7:30 p.m. $20. http://www.cinefamily.org.