Memoirs of an Assassin
A chilling glimpse into the mind of a professional killer.
In this unflinching fictional memoir, an unnamed contract assassin breaks his silence to reveal the methodical world of sanctioned murder. Operating in the shadows across Europe, Asia, and beyond, he has eliminated over twenty targets with surgical precision—each death carefully planned, expertly executed, and perfectly concealed.
What emerges is not the glamorous assassin of popular fiction, but something far more unsettling: an ordinary man who has made killing his profession. From his accidental recruitment to his evolution into a disciplined predator, he details the tradecraft of death—the surveillance techniques, the weapons of choice, the psychological compartmentalization required to function in a world where human life is reduced to a contract price.
Written with stark honesty and clinical detachment, this dark thriller explores the banality of evil and the razor-thin line between civilization and savagery. As global surveillance tightens and his latest assignment threatens to be his most dangerous yet, he must confront the ultimate question: in a world that creates monsters, what separates the professional from the psychopath?
Part psychological study, part procedural thriller, "Memoirs of an Assassin" is a disturbing meditation on morality, isolation, and the true cost of crossing lines that can never be uncrossed. A haunting exploration of what it means to be human when your humanity is your greatest liability.
Memoirs of an Assassin
USD $9.99
First published: 30 September 2025
ISBN: 978-981-94-4455-7 (PDF version)
Pages: 160
Or purchase for Amazon Kindle
What readers are saying
“Memoirs of an Assassin is an authentic thriller that stands out for its location set pieces and masterful tension. Grant Rayner’s background in the military and the security industry lends the tradecraft a sense of realism, making this a must-read! Whilst I'm fairly sure Grant is not an international assassin he certainly could be!”
“As a matter of practice, I steer clear of assassin stories, but this one surprised me. Instead of leaning on nonstop violence or over-the-top suspense, it spends its time on the thinking behind the work — the psychology, the planning, the trade-offs, and the quiet risks that sit beneath each action. The writing is clean and matter-of-fact throughout. By the final chapter, the pace picks up noticeably in a way that feels like a clear setup for an interesting series. It left me curious about where the story goes next. I’ll be keeping an eye out for the author’s next book.”
Short Stories
Standalone glimpses into the assassin's world — scenes, memories, and moments that live alongside the main novel.
Read Short Stories →About the Author
Grant Rayner began his adult life in the military, starting in the infantry where he served as both a soldier and a non-commissioned officer. He later commissioned as an officer, serving in intelligence and special operations roles.
After leaving military service in 2002, Grant established himself as a security and crisis management consultant. Since 2012, he has run his own security consulting company, supporting global companies and NGOs across Asia and the Middle East. With over 24 years of experience in the field, he has travelled extensively and supported clients during and after a wide range of complex crisis events.
He is also an active photographer, with work exhibited internationally. One of his side projects includes designing discreet and durable travel bags under the Station XV brand.
Grant is an established author, having written more than ten non-fiction books on travel security and crisis management. These books are available on the Spartan9 website. Memoirs of an Assassin is his first work of fiction.
Grant has lived in Singapore for more than two decades. He travels frequently and can often be found writing in cafés around the world. He is currently working on the sequel.
He is definitely not an assassin.