I've read her books not in order but I feel that it is perfectly alright as a stand alone.
The plot is seemingly straight forward but you do get it right away that it is not. It wouldn't
be a Tana French book if it were. We have Antoinette and Stephen - one abrasive, aggressive and clever and the other diplomatic, quiet and clever. A winning team whichever way one looks at it. The crime is seemingly straightforward as well. A woman killed apparently by her boyfriend. All the signs point to it, and all the other senior detectives on the Squad believe it is so. They cannot understand Antoinette dithering over the crime.
It seems to be too pat for our detectives and further investigations are called for, surreptitiously and without the knowledge of others on the Squad, also without the knowledge of their seniors. Both detectives know they are in for a host of trouble if word gets out and when the pointers are to one of their own, they know they are in for a lot of trouble.
The twists and turns of this investigation keeps the reader on edge. The characterization of the detectives were spot on, each one different to the other and each one showing up the investigation in different ways.
The book was sent to me by Netgalley for an unbiased review courtesy of Hodder and Stoughton.