4.5, really. 
 To be honest I don't quite know what stopped me from giving this book a 5, and I might change it later. This is definitely an incredible book. The whole self-discovery that Nasty is going through, well, it can't help but have an impact on the reader. She is without a doubt a cool ass mother-fkr. 
 The world building was done so well. At first, I felt a little lost but the wierdest thing was at one point in the book, I stopped reading and assumed I was immortal. I kid you not. I was so focused on Nasty that it took me a while to realise that this mere mortal is not burdened with centuries. That was a pretty cool experience.