Salvation of a Saint Higashino, Keigo

A successful entrepreneur dies from arsenic poisoning in his Tokyo apartment. His coffee was clean when he drank it. The house was locked from the inside. His wife — who'd just discovered his affair — has an ironclad alibi: she was hundreds of miles away when he collapsed. Detective Kusanagi is stumped until he calls in physicist Manabu Yukawa, known as "Detective Galileo," whose logical mind approaches murder like an equation. Keigo Higashino, Japan's bestselling mystery author, constructs an impossible crime that's less about who did it and more about how it could possibly be done. The solution is ingenious, almost mathematical in its precision, and completely fair — all the clues are there. For fans of locked-room mysteries and cerebral crime fiction where the puzzle matters as much as the people.