The Armenian Library and Museum of America is hosting a talk and book-signing Thursday by best-selling author Chris Bohjalian, who just released “The Sandcastle Girls,”  a novel that explores the Armenian genocide. Bohjalian, who has written numerous other books including “Midwives,” will speak about his new book, which has earned glowing reviews from USA Today, The Washington Post, and The Seattle Times. The free event begins at 7:30 p.m. at 65 Main St.