Newcomer by Keigo Higashino
I have been a fan of Higashino's for years, but the order his books are translated into English seems rather haphazard. Thankfully the ones I've read have all been able to stand on their own, including Newcomer.
The newcomer is Detective Kaga, who has been newly transferred to the district. He is investigating the murder of a divorced woman who lived by herself, also a relative newcomer to the area. Kaga is like Sherlock Holmes in a way, picking up on the tiny, seemingly insignificant clues, but he's friendly and nice and puts people at ease. And he doesn't have a sidekick. He works with others in his department, but only when he needs to, he does his best work when he's on his own.
This is a puzzle-type mystery. We have an odd assortment of clues and a large batch of potential suspects, but no good, solid possibility. The way the book is set up is a bit unusual. Each section...