International and New York Times bestselling author Steve Berry (www.steveberry.org) will appear with fellow thriller writer and Bostonian Joe Finder (www.joefinder.com) at Porter Square Books, located at 25 White Street in Cambridge on April 15 at 7 p.m. Berry will talk about his new book, “The 14th Colony” and both authors will sign books. For more information, call 617-491-2220.