Kate O'Reilly, mother of three on the cusp of her 45th birthday, has got a thing about the past. Her husband, Seamus and long-standing best friend, Georgia, both call her chronic nostalgia an obsession - but Kate sees it as her safety harness, her private Prozac, her coping mechanism of choice. Because when being a wife and mother is weighing her down, making her feel trapped and overwhelming her, all Kate needs to do is take a quick trip down memory lane - to where the music was better, her social circle was wider, her self-esteem higher, her hair thicker and her waist much, much thinner -...