Author Matthew Langdon Cost will talk about his latest book, “Joshua Chamberlain and the Civil War: At Every Hazard,” a historical novel about one of that war’s genuine heroes, a college professor with no formal military training who, together with a small company of men, turned the tide of the battle and the war with a bayonet charge at Gettysburg.

WHEN: Noon Wednesday

WHERE: Portland Public Library, Rines Auditorium, 5 Monument Square, Portland

HOW MUCH: Free

INFO: 871-1700; portlandlibrary.com