(Doubleday, 320 pp.) When middle-aged poet Harry Quirk is thrown out by his wife (who鈥檚 mistakenly convinced he鈥檚 having an affair), he struggles to begin life again in his rapidly gentrifying Brooklyn neighborhood. Kate Christensen is a gifted novelist who knows how to deliver the goods when it comes to ruefully funny, bittersweet character sketches. (June)