Book #2 of the English translations of his Detective Galileo series.
Police are frustrated trying to solve the murder of a businessman in his own home.
Poison.
Was the mistress? Or the rejected wife? Or someone else.
Finally they call in a genius — Manabu Yukawa, a university physics professor who’s something like a Japanese Sherlock Holmes. His nickname is Detective Galileo.
Slow paced, like book #1 in the series – Devotion of Suspect X.
Yet I was never bored in either book. The professor is a fascinating character. And the slow burn feels authentically Japanese.
Here’s how Yukawa was cast in one TV adaptation.

Kaoru Utsumi, a rookie female detective, is wonderful too.