'The nuclear family has a bad literary rap. As we know from fiction and memoir, the traditional two-heterosexual-parents-and-biological-kids model, a structure that provides stability and nourishment for some, can also be a stricture, a disappointment, even a crucible of cruelty. The opening sentence of Anna Karenina notwithstanding, unhappiness is unhappiness; there are common experiences for the survivors of family difficulty, even when specifics differ.' (Introduction)