Murder at Manzanar (Polish Dragon P. I.)

When a Buddhist statue is broken in a temple, an envelope is found hidden inside. The name on the envelope is not anyone associated with the temple. The minister hires the Polish Dragon P. I. to find the person and deliver the letter. While attempting to find the person the Polish Dragon P. I. finds himself digging into the past and uncovering a murder and perhaps spying at one of the Japanese internment camps during World War II. The protagonist finds himself in the midst of corporate espionage and maybe even the Yakuza.