With the return of PBS’s Great American Read last week, we’re taking a trip across America—from Maine to California—with these great books! Maine by J. Courtney Sullivan For the Kellehers, Maine is a place where children run in packs, showers are taken outdoors, and old Irish songs are sung around a piano. As three generations of Kelleher women arrive at the family’s beach house, each brings her own hopes and fears. Maggie is thirty-two and pregnant, waiting for the perfect moment to tell her imperfect boyfriend the news; Ann Marie, a Kelleher by marriage, is channeling her domestic frustration into…