I didn't know anything about 'comfort women'; the women and girls that were forced into sexual slavery by the Imperial Japanese Army before and during WWII. The name is a euphemism for prostitute(s). Women were either abducted from their homes in countries that were under Japanese rule, or lured with promises of work in factories — our character, Ja-hee and her sister were told they were going to work at a boot factory. I was completely immersed in the flashbacks, but not vested in Anna. As a main character, I felt that she was underdeveloped and flat.
This was an ambitious topic, not only is Andrews writing historical fiction, about another culture, but also as a female. For the most part, I would say he pulls it off. The difference in the rating for me between a four and a five star review is that the narration was made up of short choppy sentences and this abrupt writing style between the passages of dialogue was distracting for me as a reader and the story then became a bit forced.