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Katana Nidan: The Unwritten Koan

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Masters from the Hall have embarked on a dangerous mission. Can Katana save her mentor from an Arashi killer? ★★★★★ "Very satisfying... can't wait to find out what happens next!” Buy Katana Nida...
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  • 11 August 2026
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Masters from the Hall have embarked on a dangerous mission. Can Katana save her mentor from an Arashi killer?

★★★★★ "Very satisfying... can't wait to find out what happens next!”

Buy Katana Nidan to join the magical adventure today!



The Arashi have stolen the Scroll of the Five Masters from the Hall of the Dragon, but their master cannot unlock its secret: the key to immortality. Believing the answer must lie in the temples’ secret archives, he’s on the offensive. And it’s only a matter of time before he attacks the Hall of the Dragon.



The Hall is launching a covert mission to foil his plans, but they’re running out of time. Katana has already mastered two of the mysterious Chen Do skills, and is on her way to achieving a third. But will she be powerful enough to confront the enemy when he infiltrates the Hall? In the end the fate of her mentor will lie in her hands.



Katana Nidan is the second book in an epic YA urban fantasy series. If you like coming of age stories, full of action and adventure, mystery and magic, then the Katana books will keep you on the edge of your seat wanting more!


Buy Katana Nidan to join the magical adventure today!
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Price: $19.99
Pages: 300
Publisher: Vinci Books Ltd
Imprint: Vinci Books Ltd
Publication Date: 11 August 2026
Trim Size: 7.80 X 5.10 in
ISBN: 9781036708917
Format: Paperback
BISACs: YOUNG ADULT FICTION / Action & Adventure / General, Children’s / Teenage fiction: Contemporary and urban fantasy, YOUNG ADULT FICTION / Fantasy / Contemporary, YOUNG ADULT FICTION / Girls & Women, Children’s / Teenage fiction: Mythic fantasy / Myths and Legends fiction, Martial arts fiction
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Ken Warner grew up reading science fiction and fantasy; his early favorites were The Chronicles of Narnia, Dune, and of course, Lord of the Rings. When he began his martial arts training in high school, he heard many myths and legends about masters who possessed mysterious powers, typically attributed to their internal chi energy. He often thought these legends would make a great story. This ultimately led to his first books, The Katana Series. Ken continues to focus on science fiction and fantasy in his writing. He went full time with his author career late in 2020. Ken lives in Connecticut with his wife, Parveen, and their many dogs and cats.