I've just started reading it. In chapter 1, Didion says, "This is my attempt to make sense of the period that followed, weeks, then months that cut loose any fixed idea I had ever had about death, about illness, about probablility and luck, about good fortune and bad, about marriage and children and memory, about grief, about the ways in which people do and do not deal with the fact that life ends, about the shallowness of sanity, about life itself."
Wow, huh?