I picked up this book, didn’t read the back & bought it. I just had some feeling that I was going to love this book & I did. The world is intricate and the premise is so different from any other books I’ve come across- and I’m a veteran reader, for my age at least. I have so many more questions and am looking forward to the future books. Now, I didn’t give it the full five stars  because the love subplot really took me by surprise, in a way it shouldn’t have. There was not  much foreshadowing. It didn’t even need to be in obvious (ex. Toes curled in my shoes). Like I thought the romantic interests were into other people! 
Edit:
I look back on this book VERY fondly. It’s one of the most unique worlds a magic systems I’ve ever read. It took a second to find my footing but once I had it- it all was worth it.  the plot is compelling, dark, confusing in the best way & creating more questions to be answered. the world-building is never complete with Samantha Shannon. that’s one of the many reasons why she is in my top 5 favorite authors. 

TBS has been changed to a 5 star read. Possibly even six  because I think about it so often