(Random House, 304 pp.) Fans of Schwartz’s 1998 novel “Reservation Road” will be delighted to see a sequel arrive this summer. Dwight Arno (the hit-and-run-driver of “Reservation Road”) is now out of jail and living on his own in California when his estranged son Sam, a college student deep in troubles of own, turns up on his doorstep. (July)