Besides being busy and sick, this book was a CHORE to get through.

From Amazon:

Two women in their late 30s have been killed in similar fashion within a year of each other: Yuriko, a prostitute, and Kazue, a successful professional who was turning tricks on the side. They are linked by a nameless woman, older sister of the former and classmate of the latter, who lays out their histories and her own in a chillingly dispassionate, curiously defensive narrative.

This book is written in the point of view of four different people.  First the bitter older sister, then the beautiful younger sister, then the whacked out friend....just when you think you can't take anymore, you're hit with an entry from the sociopath murderer himself.
All four of these people are so severely damaged that I feel depressed after reading this book.  After the nameless woman reads the journals of both the murdered girls and the confession of the murderer, when most authors would make this into a positive turning point in the bitter hag's life, Kirino doesn't.

I have very little patience for irrational people.  So many times I wanted to say "So what you don't seem to fit into society?  Is that a reason to go selling yourself to homeless men in parking lots?".
Not one of these characters had an ounce of self realization and I suppose that was their downfall.
The main, nameless character was a dark, hateful creature.  She felt like her beautiful sister was the grotesque one because her beauty was so supernatural but SHE was the true monster and even worse because she justified her actions by blaming it on the weakness of others.

Natsuo Kirino seems to be a balls out writer.  If you think something is too graphic or unpleasant to mention in a novel, think again because she's going to mention it....often.

Although I was deeply annoyed by these pathetic characters, the author had this amazing ability to transform me into their dark, ugly world and I felt a little dirty when it was over.  That's high praise, indeed!