The Blind Assassin by Margaret Atwood

The Blind Assassin is an award-winning, bestselling novel by the Canadian author Margaret Atwood. The Blind Assassin was first published by McClelland and Stewart in 2000. Set in Canada, The Blind Assassin is narrated from the present day, referring back to events that span the twentieth century.
The Blind Assassin was awarded the Man Booker Prize in 2000 and the Hammett Prize in 2001. The Blind Assassin was also nominated for Governor General's Award in 2000, Orange Prize for Fiction, and the International IMPAC Dublin Literary Award in 2002. Time Magazine named The Blind Assassin the best novel of 2000 and included The Blind Assassin in its list of the 100 greatest English-language novels since 1923. The novel The Blind Assassin centres on the protagonist: Iris Chase, as her sister Laura, committed suicide shortly after the Second World War ended. Iris, now an old woman, recalls the events and relationships of her childhood, youth and middle age, as well as her unhappy marriage to a rival of her industrialist father. Interwoven into the novel is a story within a story, a roman à clef attributed to Laura and published by Iris about Alex Thomas, a politically radical author of pulp science fiction who has an ambiguous relationship with the sisters. That novel itself contains a story within a story, the eponymous Blind Assassin, a science fiction story.
The novel takes the form of a gradual revelation, illuminating both Iris' youth and her old age before coming to the pivotal events of her and Laura's lives around the time of the Second World War. (Summary by Wikipedia)