Every classic mystery is a magic trick - it works through misdirection. While the magician entices us to watch something in the open, his quicksilver hands does the business out of sight, and we are mystified at the apparent breakdown of the rules of nature. "The hand is quicker than the eye." In the mystery story, it is the same - we are persuaded to chase the red herrings while the writer cleverly builds up his plot under wraps. The only difference is, unlike the magic trick, the novelist tells us how it was done at the end.
Keigo Higashimo's "The Devotion of Suspect X" was a classic in this aspect. "Malice" was also good, though by then I could sense how his particular style of sleight-of-hand was carried out. In "Salvation of the Saint", however, the style is slightly different.
As with "Devotion...", the murderer is pretty clear from the beginning. The focus in a Higashimo novel is not as much on "whodunnit" as "howdunnit". In this aspect, he resembles the great Dorothy Sayers (for example, the novels "Strong Poison", "Unnatural Death" etc.) - it is impossible for the most likely person to have committed the murder: yet it was done.
When Yoshitaka Washiba is murdered by poison in his coffee, his beautiful wife Ayane is the obvious suspect - especially since Yoshitaka had declared his intention of leaving her and marrying her young apprentice Hiromi Wakayama. The problem is, Ayane is hundred of kilometres away when the murder happens, as per the testimony of Hiromi herself. It is left to Detective Kusanagi to unravel the mystery, all the while fighting the strong attraction Ayane exercises over him. However, he has Professor Yukawa of Tokyo University ("Detective Galileo"), who solves cases like problems in physics: constructing hypotheses and testing them.
There is no long trail of false clues in this story - the whole thing boils down to how the poison was introduced into the coffee. But while the method is brilliant and there is a logical explanation for all the doubts it gives rise to, I felt slightly disappointed here as I partly guessed where the poison was, and how it was disposed off. As any mystery which is amenable to deduction by the reader disappoints me, I wouldn't rate this as high as his other novels I have read.
Still, an extremely enjoyable and well-written mystery, with memorable characters. I am getting to be a fan of Detective Galileo.