The Golden Notebook by Doris Lessing

In 1950s London, novelist Anna Wulf struggles with writer’s block. Divorced with a young child, and fearful of going mad, Anna records her experiences in four coloured notebooks: black for her writing life, red for political views, yellow for emotions, blue for everyday events.

But it is a fifth notebook – the golden notebook – that finally pulls these wayward strands of her life together.