This collection of short stories is one of the most entertaining collection of mysteries I have read. The prize winner, 顔, was certainly the best story, but all are excellent and if you like one, you will probably like the others too.
Both 顔 and 地方紙を買う女 were similar in structure. We have a protagonist who is clearly hiding something, but we don’t know what it is at first. These two stories are my favourite, because it creates a tension between caring for the protagonist on the one hand and looking for the truth on the other hand. The reader does not know whether they should identify with the protagonist or keep a suspicious eye on them, and this makes for suspenseful and entertaining stories. 顔 in particular has a very good ending, and belongs now to my favourite short stories of crime fiction.
声 has a similar theme than 顔, where recognition (of a person’s voice or face) plays a role in the mystery. The two stories also have a similar structure with two different parts. While 声 did not have the same impact than 顔 it was still very good with an interesting police investigation in it as well.
白い闇 is a mystery about a husband who suddenly disappears. Even though the outcome is predictable, the story was enjoyable.
Finally, 張り込み is certainly my least favourite short story, but it was still very good, though quite depressive at the end.
Overall, the characters are all very complex for characters of short stories. Some are tormented by a dark past, some want to protect their secrets and some want to find out the truth. As for the Japanese level, this book is certainly the easiest I have read so far among the prize winners.