In the fall of 2005 acclaimed writer Mary Morris set off down the Mississippi River in a battered old houseboat called The River Queen, with two river rats named Tom and Jerry and an ailing, irascible rat terrier named Samantha Jean. Her father had just died. Her daughter had gone off to college. Lost and uncertain, Morris returned to the river of her youth, to the waterside towns where her father had once lived. In this poignant and often humorous...