Fred Vargas still surprises with its incredible plot. And our minds healthy and naive, imagine that the real killer? Not me anyway and it's not for lack of trying hard to overcome the suspense. This brings us to walk in the mountains and beyond, now on the track of a Canadian trekker sometimes in a cattle branque dangling and stinking. What stands out the most? The personality of the players of this game enthusiast whose most passionate of all is our dear Adamberg. He will arrive at his ends? Yes, but why? Ah ah! Go figure.