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The Katla Kill Files

The Katla KillFile short stories chronologically precede the novels in the Amsterdam Assassin Series. Each KillFile features Katla Sieltjes, expert in disguising homicide, executing one of her contracts. While not mandatory reading, each KillFile provides insight both in Katla’s work methods and skill, and additional background information in her character and personal history. The KillFiles can be read out of order, as the contracts are random samples from Katla’s past.



Locked Room

The Locked Room KillFile (6,500 words) follows assassin Katla Sieltjes as she creates a Locked Room Murder Mystery, while exacting revenge on a physician responsible for the death of her client’s wife. By using a method that has become a forensic landmark, she recreates an updated version of a lethal puzzle that astounded forensic scientists since the original murders occurred at the start of the twentieth century. But first she has to get in and out of her target’s penthouse apartment unseen.

Microchip Murder

The Microchip Murder KillFile (8,500 words) follows Katla Sieltjes as she has to kill a woman recently fired by her employer, and recover the microchip and research materials stolen by the ex-employee. Meanwhile, the target is wary and looking for a way to sell the microchip to the competition.

Fundamental Error

The Fundamental Error KillFile (9,800 words) follows Katla Sieltjes, freelance assassin and corporate troubleshooter, on her most dangerous assignment yet. When Peter Brandt watches his brother Roel convert to Islam and turn into a domestic terrorist, Katla needs to enter into the mind of a fanatic suicide bomber in order to thwart a mass-murder attack in the shopping mecca of Amsterdam.


The Amsterdam Assassin Series



Book 1: Reprobate

Blessed with an almost non-existent conscience, Katla Sieltjes, expert in disguising homicide, views assassination as an intricate and rewarding occupation. Hidden behind her male alter ego Loki, Katla receives anonymous assignments, negotiates the terms with clients through electronic means, all to protect her identity. Her solitary existence satisfies her until she meets a blind musician whose failure to notice a ‘closed’ sign causes him to wander in on Katla’s crime scene. And Katla breaks one of her most important rules – never leave a living witness.

Book 2: Peccadillo

Still recuperating from injuries sustained in Reprobate, freelance assassin Katla Sieltjes, expert in disguising homicide, has to take up arms against the Kau Hong, a Chinese Triad attempting a hostile takeover of her legitimate business. When not just her own life is at stake, but her lover and his friends are targeted, Katla has to wage a guerrilla war against the Kau Hong. The situation becomes increasingly complex, when a Hong Kong sniper arrives and teams up with a mute enforcer from the competitive 14K Triad. Amsterdam might prove too small for Katla to play hide and seek when her enemies are skilled in search and destroy.

Book 3: Rogue

Freelance assassin and corporate troubleshooter Katla Sieltjes runs her business of disguising homicide below the radar of law enforcement, but when her latest target is a judas goat intended to draw her out into the open, the hunter becomes the hunted. Fooling local law enforcement can be difficult, but hiding from intelligence communities aiming to enlist Katla for their dirty work might prove impossible. With Homeland Security, DEA, and the German BKA bundling their forces with Dutch Intelligence in an effort to track down Loki Enterprises, not only Katla’s future is threatened, but also the lives of her lover and his friends. 


Where to Buy Martyn’s Books:


Barnes and Noble





How to get in touch with Martyn:


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