Author Lauren Groff retreated to the middle ages for her latest novel. After her book “Fates and Furies," received wide praise, and in the aftermath of the 2016 election, Groff found solace in writing about the life of nuns cloistered together in 12th century England. We talk to Groff about her latest book, “Matrix,” in front of an audience of students at Leodis V. McDaniel High School in Portland.