The Iris Fan

Rowland's 18th and final mystery set in feudal Japan showcases the series' strengths and weaknesses. In 1709, four years after the events of 2013's The Shogun's Daughter, Sano Ichiro is grappling with the repercussions of yet another reversal of fortunes. Sano's refusal to abandon his pursuit of the truth behind the death of the aging shogun's daughter, Yoshihato, has cost him dearly. In particular, his choice to view Lord Ienobu, the ruler's nephew and heir, as responsible for Yoshihato's death has led to another demotion. Once having held the post of chamberlain, the shogun's first minister, he is reduced to a lowly patrol guard. When an attempt is made on the shogun's life, Sano gets a chance to redeem himself. The prominent place of the supernatural in the plot, more so than in other recent entries, will unsettle fans of traditional detecting. Still, Rowland offers the usual high-stakes suspense, convincing period detail, and nuanced characters you care about. Readers will be sorry to see the last of Sano. Agent: Pam Ahearn, Ahearn Agency. (Dec.)