Master ninja Hiro Hattori and Jesuit Father Mateo head up to Mount Koya, only to find themselves embroiled in yet another mystery, this time in a Shingon Buddhist temple atop one of Japan’s most sacred peaks.

November 1565: Master ninja Hiro Hattori and Portuguese Jesuit Father Mateo travel to a Buddhist temple at the summit of Mount Koya, carrying a secret message for an Iga spy posing as a priest on the sacred mountain. When a snowstorm strikes the peak, a killer begins murdering the temple’s priests and posing them as Buddhist judges of the afterlife–the Kings of Hell. Hiro and Father Mateo must unravel the mystery before the remaining priests–including Father Mateo–become unwilling members of the killer’s grisly council of the dead.

“East meets West, spies dine with monks, and mind grapples with heart in a sixteenth-century locked-room mystery on a snowy mountain. Susan Spann hits perfection yet again.” –Laurie R. King, author of The Beekeeper’s Apprentice and Island of the Mad

“A page-turning and atmospheric historical mystery that beautifully melds fascinating Japanese history with a cleverly constructed mystery reminiscent of And Then There Were None—if the famous Agatha Christie mystery had been set in medieval Japan on a sacred mountaintop during a snowstorm.” –Gigi Pandian, USA Today–bestselling author of the Jaya Jones Treasure Hunt Mysteries

“Susan Spann is up front in saying that Trial on Mount Koya is an homage to Agatha Christie. Believe me, she does the great Dame Agatha proud. This excellent entry in Spann’s series of Hiro Hattori mysteries offers plenty of esoteric clues and red herrings that are fun to chase. Along the way, she even does Christie one better, giving readers a fascinating glimpse of life and religion in feudal Japan. This is a book sure to please Spann’s growing legion of fans as well as anyone who loves the work of Agatha Christie.”
–William Kent Krueger, Edgar® Award-winning author of Sulfur Springs

Susan Spann is the 2015 Rocky Mountain Fiction Writers’ Writer of the Year and the author of five previous novels in the Hiro Hattori / Shinobi Mystery series: Claws of the Cat, Blade of the Samurai, Flask of the Drunken Master, The Ninja’s Daughter, and Betrayal at Iga. She has a degree in Asian Studies from Tufts University and a lifelong love of Japanese history and culture. When not writing, she enjoys hiking, photography, and traveling in Japan.