“Welcome to the website of Susan Spann, author of the Shinobi mystery series!”

Claws of the Cat

When a samurai is brutally murdered in a Kyoto teahouse, master ninja Hiro Hattori has just three days to find the killer before the dead man’s vengeful son kills both the beautiful geisha accused of the crime and Father Mateo, the Jesuit priest that Hiro has pledged his own life to protect. The investigation plunges Hiro and Father Mateo into the dangerous waters of Kyoto’s floating world, where they quickly learn that everyone from an elusive teahouse owner to the dead man’s dishonored brother has a motive to keep the samurai’s death a mystery.

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BLADE of the Samurai

June, 1565: When a killer murders the shogun’s cousin, master ninja Hiro Hattori and Portuguese Jesuit Father Mateo are summoned to the shogun’s palace and ordered to find the killer. The evidence implicates Hiro’s friend and fellow shinobi, Kazu, who was working undercover at the shogunate; however, the victim’s wife, a suspicious maid, and even the shogun’s stable master also had reasons to want the victim dead.

The investigation reveals a plot to assassinate the shogun and depose the ruling Ashikaga clan. With enemy forces approaching Kyoto, and the murderer poised to strike again, Hiro and Father Mateo must produce the killer in time . . . or die in his place.

Blade of the Samurai is a complex mystery that will transport readers to a thrilling and unforgettable adventure in sixteenth-century Japan.


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The Ninja’s Daughter

Autumn, 1565: When an actor’s daughter is murdered on the banks of Kyoto’s Kamo River, master ninja Hiro Hattori and Portuguese Jesuit Father Mateo are the victim’s only hope for justice.

As political tensions rise in the wake of the shogun’s recent death, and rival warlords threaten war, the Kyoto police forbid an investigation of the killing, to keep the peace—but Hiro has a personal connection to the girl, and must avenge her. The secret investigation leads Hiro and Father Mateo deep into the exclusive world of Kyoto’s theater guilds, where they quickly learn that nothing, and no one, is as it seems. With only a mysterious golden coin to guide them, the investigators uncover a forbidden love affair, a missing mask, and a dangerous link to corruption within the Kyoto police department that leaves Hiro and Father Mateo running for their lives.


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Betrayal at Iga

Autumn, 1565: After fleeing Kyoto, master ninja Hiro Hattori and Portuguese Jesuit Father Mateo take refuge with Hiro’s ninja clan in the mountains of Iga province.

But when an ambassador from the rival Koga clan is murdered during peace negotiations, Hiro and Father Mateo must find the killer in time to prevent a war between the ninja clans.

With every suspect a trained assassin, and the evidence incriminating not only Hiro’s commander, the infamous ninja Hattori Hanzo, but also Hiro’s mother and his former lover, the detectives must struggle to find the truth in a village where deceit is a cultivated art. As tensions rise, the killer strikes again, and Hiro finds himself forced to choose between his family and his honor.


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