The Library of Congress’ National Book Festival goes online this year, “Celebrating American Ingenuity” from Friday through Sunday, Sept. 25-27, via loc.gov/bookfest. A variety of authors will be spotlighted, culminating with a PBS special at 6 p.m. Sunday (WTVS-Channel 56) featuring John Grisham, U.S. Poet Laureate Joy Harjo and others.