I'll review the series so far because this is the last book available to me right now:
tl;dr: lots of thoughts. Complex, beautiful art, challenging, mature, leisurely-paced
This series boasts some of the most beautiful, detailed art I've seen in a graphic novel. One of the main goals of each installment is to explore the culture of the 19th century silk road, and the quality of the art heightens every new place we explore through its cloth, wood carvings, and landscape. The pace is slow, but we are here to observe and reflect. The visuals can be very mature at times, so I cannot recommend to younger readers, but I was surprised how chaste the stories are for the subject matter—however, the focus is mostly on how marriage customs affect daily life for everyone.
The story has challenged me quite a bit. We get to see a lot of brides and their stories, and while I enjoy thinking about how different life can be depending on your culture's social constructs, some of the situations made me feel very uncomfortable. It's peculiar to see certain circumstances presented as a justified resolution to a conflict—one example of a woman arguing for her newly widowed friend to become her husband's second wife was particularly difficult for me to root for, even as I understood that within the context, this was a really great outcome.
I would recommend for adults who enjoy manga/graphic novels and like exploring cultural differences.