I feel a bit conflicted about this book. At one hand, I really liked the worldbuilding, like a lot. Werewolves are one of the supernatural creatures I prefer, and the way they were conceptualized, especially the packs and lone wolves, by Starling was new and refreshing. I also enjoyed the mystery surrounding the drug and how addiction was one of the central themes of this story. 
On the other hand, I unfortunately didn't really care about the main characters and especially Cedric. I don't know what exactly it was, but he just was a bit bland to me and the only thing about him I liked was the lycan lore. Renzo's story was definitely the more interesting one, it still didn't make me as invested as I would like, and thus I didn't enjoy the whole book as a whole.
It's was still fine. The writing was good and the plot flowed nicely. I liked how it build the stakes for the next book in the duology.

I received an advance review copy for free, and I am leaving this review voluntarily.