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He Without Sin
Lachlan Byrn just couldn’t unsee it.
It began as a routine paid kill, but then the assignment became a crusade.
Over the years Lachlan Byrn has evolved the act of turning his back on problems that don’t concern him into an artform. So, what’s different this time?
Byrn finds himself immersed in the sordid world of human trafficking. As dark as the assassin's nature is, the activities of those he's charged with hunting down do not sit well with him. The killer's own moral compass is challenged, yet he seems determined to deal with the low life operators he's been tasked to eliminate, no matter the personal cost.
As if the shear magnitude and power of the forces he's facing aren’t challenging enough, Byrn discovers that he’s working for a dead man. Yet step by step, death by death…
It appears you can’t keep a good man down… or a bad one.
.
What Amazon readers are saying about the Lachlan Byrn Thriller
“This explosive, exciting story tells what an elite assassin goes through to stay on top… Superb. Highly recommended.”
“… one is completely drawn into this character. The plot is incredible and believe me you’ll be on the edge of your seat more than a couple of times.”
“I couldn’t put this book down. Action from start to finish.”
“I really enjoyed this novel. It’s hard to put down and the characters are spectacular.”
“The action is spellbinding, the detail is intense and the suspense is compelling. I couldn’t put it down!”
“My favorite Mark Mannock book yet!”
“A great, intense story.”
“This novel is a fast-paced action thriller. It’s hard to put down. Even though Lachlan Byrn lacks a conscience, I love his character. I look forward to reading the entire series.”
It began as a routine paid kill, but then the assignment became a crusade.
Over the years Lachlan Byrn has evolved the act of turning his back on problems that don’t concern him into an artform. So, what’s different this time?
Byrn finds himself immersed in the sordid world of human trafficking. As dark as the assassin's nature is, the activities of those he's charged with hunting down do not sit well with him. The killer's own moral compass is challenged, yet he seems determined to deal with the low life operators he's been tasked to eliminate, no matter the personal cost.
As if the shear magnitude and power of the forces he's facing aren’t challenging enough, Byrn discovers that he’s working for a dead man. Yet step by step, death by death…
It appears you can’t keep a good man down… or a bad one.
.
What Amazon readers are saying about the Lachlan Byrn Thriller
“This explosive, exciting story tells what an elite assassin goes through to stay on top… Superb. Highly recommended.”
“… one is completely drawn into this character. The plot is incredible and believe me you’ll be on the edge of your seat more than a couple of times.”
“I couldn’t put this book down. Action from start to finish.”
“I really enjoyed this novel. It’s hard to put down and the characters are spectacular.”
“The action is spellbinding, the detail is intense and the suspense is compelling. I couldn’t put it down!”
“My favorite Mark Mannock book yet!”
“A great, intense story.”
“This novel is a fast-paced action thriller. It’s hard to put down. Even though Lachlan Byrn lacks a conscience, I love his character. I look forward to reading the entire series.”
406 pages, Kindle Edition
Published July 19, 2025
4 people are currently reading
2 people want to read
About the author
Mark Mannock
20 books13 followersMark Mannock was born in Melbourne, Australia. He has had an extensive career in the music industry including supporting, recording with or writing for Tina Turner, Joni Mitchell, The Eurythmics, Irene Cara and David Hudson. His recorded work with Lia Scallon has twice been long-listed for Grammy Awards.
As a composer/songwriter Mark’s music has been used across the world in countless television and theatre contexts, including the ‘American Survivor’ TV series and ‘Sleuth’ playwright Anthony Shaffer’s later productions.
Mark has also been active in music education across Australia promoting student’s ownership and voice in their own educational music journeys. He has won several awards for his endeavours in this area.
Mark is presently writing the successful ‘Nicholas Sharp’ thriller series about a disillusioned former US sniper whose past plagues him as he makes his way in the contemporary music industry. Sharp is a man whose insatiable curiosity and embedded moral compass lead him to places he ought not go. The series is currently read in over 50 countries.
Mark is also writing the new Lachlan Byrn Thriller series. Is Byrn an assassin, vigilante or serial killer?
Mark lives in Kettering, Tasmania with his family. His travels around the globe act as inspirations for his writing.
Mark enjoys hearing from his readers, so please feel free to contact him.
As a composer/songwriter Mark’s music has been used across the world in countless television and theatre contexts, including the ‘American Survivor’ TV series and ‘Sleuth’ playwright Anthony Shaffer’s later productions.
Mark has also been active in music education across Australia promoting student’s ownership and voice in their own educational music journeys. He has won several awards for his endeavours in this area.
Mark is presently writing the successful ‘Nicholas Sharp’ thriller series about a disillusioned former US sniper whose past plagues him as he makes his way in the contemporary music industry. Sharp is a man whose insatiable curiosity and embedded moral compass lead him to places he ought not go. The series is currently read in over 50 countries.
Mark is also writing the new Lachlan Byrn Thriller series. Is Byrn an assassin, vigilante or serial killer?
Mark lives in Kettering, Tasmania with his family. His travels around the globe act as inspirations for his writing.
Mark enjoys hearing from his readers, so please feel free to contact him.
Ratings & Reviews
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Community Reviews
Displaying 1 - 4 of 4 reviews
July 18, 2025
Lachlan Byrn is alive and well and still sailing in his small boat. In this novel, Lachlan encounters human traffickers, against whom he has a personal vendetta.
While on a job, Lachlan becomes an unlikely hero when he performs a difficult rescue. Although he doesn't consider himself a hero, several people consider him a warrior for his efforts.
The novel has a real twist, one that I wasn't expecting. I plan to re-read the novel because it has such an unexpected plot.
Lachlan Byrn is a killer, but he's a hero in some people's eyes. Personally, I like Lachlan Byrn. His evils are due to a past over which he had no control. In a small way, Lachlan is trying to help other people to live better than he did.
This series is perfect for anybody who enjoys fast-paced thrillers. Although the novels are stand-alone, it does make them more enjoyable to read them in order.
While on a job, Lachlan becomes an unlikely hero when he performs a difficult rescue. Although he doesn't consider himself a hero, several people consider him a warrior for his efforts.
The novel has a real twist, one that I wasn't expecting. I plan to re-read the novel because it has such an unexpected plot.
Lachlan Byrn is a killer, but he's a hero in some people's eyes. Personally, I like Lachlan Byrn. His evils are due to a past over which he had no control. In a small way, Lachlan is trying to help other people to live better than he did.
This series is perfect for anybody who enjoys fast-paced thrillers. Although the novels are stand-alone, it does make them more enjoyable to read them in order.
July 6, 2025
I am a reader. An old reader. I read books and the authors ask for a review. Easy really! What do I think of the talents of the person who wrote this book.
Who am I to be writing such reviews by someone such as Mark Mannock? He has such a perfect grasp of so many communication skills and I barely can write my name.
With such great creatives such as Mannock and others, I usually just flag 5 stars and go home, head hung.
However that doesn’t help get others to sit down and read and actually see what he is saying.
I would truly appreciate and and enjoy a week with this great creative, yes creative not just a writer. This fellow is the complete package. Thank you Mark! If you ever need broke travel companion for a week, we’ll just call!
😂
Michael Nethery
Who am I to be writing such reviews by someone such as Mark Mannock? He has such a perfect grasp of so many communication skills and I barely can write my name.
With such great creatives such as Mannock and others, I usually just flag 5 stars and go home, head hung.
However that doesn’t help get others to sit down and read and actually see what he is saying.
I would truly appreciate and and enjoy a week with this great creative, yes creative not just a writer. This fellow is the complete package. Thank you Mark! If you ever need broke travel companion for a week, we’ll just call!
😂
Michael Nethery
July 6, 2025
Lachlan, friend to no one, foe to many. Yet, in this narrative. Lachlan seems to show a slight glimpse of humanity. Perhaps the old heart isn't entirely made of stone. But yet...
Highly Recommended.
Highly Recommended.
July 19, 2025
I couldn’t wait for the release of the new Lachlan Byrn book, and as always, Mannock has done it again. Lachlan Byrn is among my 2 favorite fictional characters. Even though killing seems to be the only thing that soothes his tortured soul, Byrn has a steadfast moral code, only killing those who are found irredeemably guilty. I love Byrn’s thought processes. He leaves nothing to chance, committing every aspect of his mission to memory, and imagining every possible scenario. He relentlessly pursues the worst of humanity. I couldn’t put this book down and had to get up at 2:00 AM to finish it. Thank you, MM, for another amazing book in this series!
Displaying 1 - 4 of 4 reviews