Somalis in Maine? : Strout's novel

Still enjoying Elizabeth Strout's The Burgess Boys though I don't think it's as groundbreaking in form as some of her earlier work - a pretty conventional narrative told with multiple protagonists all living in the same community, and it centers on a hate crime committed by a troubled teen against the newly arrived and growing Somali community in this small Maine town. We see things from alternately the POV of the boy and his family - the main character is his uncle, a Brooklyn lawyer and a bit of a loner and, compared with his extroverted and highly successful older bro, a bit of a failure - and over time we'll see if they develop a relationship, familiar or professional, and what kind of atonement they can make toward the Somali community (are there really hundreds of Somali immigrants in Maine? I hope this isn't an "issue novel"). The most Strout-like aspect is not the developing plot line but the peculiar relation between the lawyer/uncle - Bob - and his dour twin sister, Susan, the only one in the family to stay on in the small Maine town. Bob seems like a lost Anne Tyler character, the hapless and eccentric bachelor (or in this case divorcee) - and Susan seem like I don't know, a type unto herself, cranky and self-centered. For a dour character, though, she does talk a lot - which enables Strout to provide lots of plot info, but that also makes it hard to understand just who she is and what her relation to the two brothers, both in Brooklyn, might be or become.