I haven't read a good mystery for long. But this one is really good. KH's husband gave it to me to kill time during the flight to San Francisco, but I did it today.
"Hazakura no koro ni kimi wo omou toiukoto (Thinking of You in the Leafy Sakura Season)" utilized reader's (unconscious) assumption and imagination very well. I felt similar sense of trick in "Lautrec so jiken (Toulouse-Lautrec Lodge Case)" by Yasutaka Tsutsui, though both books use different kind of tricks.
OK, I know. Now, I have to finish at least one book (academic one, damn) before I leave here. That's my hope.