Book excerpt: Growing up deep in the mountains of rural Japan in 1861, Sachi has always felt different. Her life is turned upside down at 11 when she is taken to the women’s palace in the great city of Edo. There she is chosen to be the young shogun’s concubine. Set in one of the most tumultuous eras in Japanese history, The Last Concubine is an epic evocation of a country in revolution, and of a young woman’s quest to find out who she really is.