The Buried Giant by Kazuo IshiguroRead about the other entries on the list.
I could have chosen other Ishiguro novels – The Unconsoled being the obvious example – but I regard The Buried Giant, along with The Remains of the Day, as Ishiguro’s finest achievement to date. The manner in which it evokes the mythical and magical in exploring the political repression of memory is remarkable. As Axl and Beatrice slowly recover some of their memories, a deeply divided and violent world is revealed, perhaps one that deserves to be forgotten, suggesting that a degree of forgetfulness is vital for such a world to survive.
Also see Sam Taylor's top 10 books about forgetting.