This my second Adrian McKinty book and the guy definitely has a way with words and an ear for dialogue.
One of the joys of reading is discovering "insights," social commentary or sometimes comments on the human condition that hum in your mind, and linger with you long after the main plot of the book is forgotten. This is one of those books that stays with you after having finished it.
The usual debate between realism and naturalism is quite obvious here, but realism is at its center. I don't understand someone, who wants to read a book that's too real. That would be life, and we read, in part, as an escape from the mundane. What makes a writer like McKinty special is his ability to place realistic characters--people we feel like we know--into extraordinary situations and see how they react and are affected by them.
One of the best thing about "I Hear Sirens in the Street" is its depth. It rises above the dualities to show the greater complicity, and to show that the psychopaths on one side are pretty much like the psychopaths on the other side.
I like comfort reads too, but the best noir being written now will have us look into the abyss and the book will then become a mirror as the abyss looks back.
If I wanted to read formulaic plots, I'd go to the supermarket, drugstore or airport book shelves or (alas) to the library's best-seller section.