The Summer Before the Dark (Vintage International) by Doris Lessing

Nobel laureate Doris Lessing's classic novel of the pivotal summer in one woman's life is a brilliant excursion into the terrifying gulf between youth and old age.

As the summer begins, Kate Brown—attractive, intelligent, forty-five, happily married, with a house in the London suburbs and three grown children—has no reason to expect that anything will change. But by summer's end the woman she was—living behind a protective camouflage of feminine charm and caring—no longer exists. The Summer Before the Darktakes us along on Kate's journey: from London to Turkey to Spain, from husband to lover to madness, on the road to a frightening new independence and a confrontation with herself that lets her finally and truly come of age.