From publisher's website
A Polite Inquiry is the fifth installment in our popular Kesshi Tales series!
In Tetsu Sangaku, the economy runs on the ore pulled from the ground, so when a well-established mine is beset by a plague the kesshi are sent to make a polite inquiry. What dangers lurk beneath the mountains of Inzuu? After discovering the apparent source of the problems can the kesshi find out the truth of things before things get even worse?
In our streamlined, signature format, Kesshi Tales #5: A Polite Inquiry, is the largest adventure in the series to date.