Damn, it devours.

A Psy is accused of murdering his wife and one of his patients decides to investigate by diving into the meanders of the couple, the lovers rumors, lovers, the confidences of other patients, the drama of a couple who loves more, and all with background in the past of Argentina under dictatorship ...

I have not read the previous novel Grémillon, so I can make a comparison "is better less."
One thing is certain, the book devours, by design (lots of cuts, dialogues, etc ...) and disseminated by the suspense. It is abused, it can not unravel all the tracks and is picked by the outcome.

In short, very well done for a novel you dévorerez.