Author and Books Are Magic owner Emma Straub’s newest novel, All Adults Here, is out this week — and it’s full of food. “For someone who is not a very good cook, all of my books always have a lot of food in them,” she says. All Adults Here, which is set in the Hudson Valley, partly takes place in a small-town diner — “I really miss diners,” Straub says — as well as on a goat farm, where goat