The Devotion of Suspect X (by Keigo Higashino)

One of the Read Harder challenges this year is to read a "whydunit" or "howdunit" and this Japanese mystery was recommended in the "howdunit" category. And it definitely fits: you find out who is murdered, and by whom, at the very beginning. Then you follow the trail of the detectives investigating the case and the murderer as they try to cover their tracks.  The question isn't how did the murder occur, but how did the murderer cover their tracks and will the detective uncover the solution.

I thought it would be impossible for this novel to have some kind of twist, but it did anyway, and I loved it. The ending was abrupt (there is a sample of another book at the back, so partly it was that we were not at 100% yet in the Kindle progress meter when it ended) but really works. Another hit in my series of Japanese mystery novels!