I don't normally read historical novels but this one drew me in. It took a little while to get into the novel as the cast of characters is large and the narrative jumps between them. Once I was a few chapters in, I was as hooked on the book as some of the characters on the opium. I did find some of the dialect a little off putting at time and although it could be argued that it adds authenticity, at times I felt it distracted from the overall narrative.
The novel is written very sensuously allowing the reader to place themselves in the characters shoes, this in itself can be harrowing however and the read is not light or easy.
It is also worth remembering that this book is intended to be the first of a trilogy and as such there is no overall resolution to the end of the novel but well worth persevering.