Brookline: Giant of the environmental movement, cofounder of the Small Planet Institute, and author of “Diet for a Small Planet,’’ Frances Moore Lappe discusses her new book, “EcoMind,’’ which identifies and debunks seven key “thought traps’’ that keep us from making the changes needed to save the world, 7 p.m. next Thursday at the Brookline Booksmith, 279 Harvard St. Free. 617-566-6660, www.brooklinebooksmith-shop.com.
Concord: The Concord Museum, 200 Lexington Road, is hosting “Be Our Guest,’’ allowing visitors to explore its offerings - such as the special 125th anniversary exhibition “Crowdsourcing a Collection’’ - for free, Sunday from 1 to 4 p.m. 978-369-9763, www.concordmuseum.org.
Natick: Greg Skomal of Discovery Channel’s Shark Week talks about local species, including the increasing populations of great white and basking sharks, Tuesday, 7:30 p.m., at the Broadmoor Wildlife Sanctuary, 280 Eliot St. $12. 508-655-2296, www.massaudubon.org.
Watertown: “The Tale of the Allergist’s Wife,’’ a comedy by Charles Busch that focuses on the burgeoning midlife crisis of an upper-crust, Upper-West-Side woman, opens tomorrow at 8 p.m., followed by shows 8 p.m. Saturday, 2 p.m. Sunday, and Jan. 27-29, at the Arsenal Center for the Arts, 321 Arsenal St. $22; $20 students, seniors. 617-923-0100, www.wellesleyplayers.org.
Weston: Vermont musician Ian Ethan performs a program of music on the 18-string, double-neck acoustic guitar, a seldom-seen instrument that provides distinctive, multilayered harmonies that Ethan explores in his acclaimed compositions, Sunday at 3 p.m. at the Weston Public Library, 87 School St. Free. 781-893-3312.