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When a covert operator with links to Charlie Cooper is killed, the trail leads to a secret outfit few believe is Hemlock.

No witnesses. No records. No proof it ever existed. Just rumours, half-forgotten files, and a growing body count.

As Cooper digs deeper, the evidence keeps disappearing—and so do the people who get too close. Hemlock doesn’t operate in the shadows. It owns them, using blackmail, corruption and murder to shape events from the inside.

The closer Cooper gets to the truth, the clearer it this isn’t a conspiracy you expose.

It’s one you survive.

Because Hemlock has endured for decades by doing one thing better than anyone else—making sure it’s forgotten.

Fast, brutal, and impossible to put down, Hemlock is a razor-sharp Charlie Cooper novella—perfect for fans of relentless action, hard choices, and killers who don’t miss twice.

136 pages, Kindle Edition

Published March 1, 2026

442 people are currently reading
14 people want to read

About the author

Mark Dawson

108 books40 followers
Librarian Note: There is more than one author by this name in the Goodreads data base.

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Community Reviews

5 stars
228 (57%)
4 stars
129 (32%)
3 stars
35 (8%)
2 stars
3 (<1%)
1 star
1 (<1%)
Displaying 1 - 11 of 11 reviews
4 reviews
March 4, 2026
Another good story

Mark doesn't waste words . I enjoy a good story that keeps to point and provides a satisfying quick read.
70 reviews
March 2, 2026
Another case for Charlie the chameleon Cooper

Following on from his last outing in Jordan, and the words uttered from Vanessa as she fell to her death 'Hemlock'. Now on the trail to find and eliminate this group Charlie finds himself looking at prominent figures who are or have power, with the help of Nathan the tech guy, he manages to infiltrate the systems run by Hemlock.
This is a brilliant 'edge of your seat' read that you won't want to put down until you have read the very last word! A 5🌟 triumph for Mark Dawson
91 reviews
March 18, 2026
Hemlock – a Mark Dawson novel
“A Charlie Cooper Thriller”
Dawson hits another home run with his creative and very “real feeling” action mystery set in London and the surrounding countryside. A splinter organization of British spies of various government sources works to corrupt not only the UK government, but large private enterprises and their leaders. Charlie Cooper takes on the assignment to find what others have failed find and the game is on! Only Charlie’s global experiences and keen knowledge of the environment with a little luck along the way enables him to survive the ordeal.
76 reviews
March 7, 2026
Charlie Cooper

Mr Dawson did it again, Hemlock ,though , a shorter novel than most was a joy to read. He managed to hit all the bases as usual., plus cover the some questions left over from Charlie's last adventure. It was a very entertaining story and I look forward to many more hours with Charlie, John, Isabella and of course Atticus.
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573 reviews1 follower
March 10, 2026
An awesome Charlie Cooper thriller!

What is Hemlock? That is what Charlie Cooper is trying to find out and who is behind it. Hemlock was the last word that Vanessa said falling to her death. This book is unputdownable, and I really liked it. I highly recommend this book! Happy reading! ☺️
Profile Image for Karen Team-orange.
90 reviews3 followers
March 4, 2026
Never get tired of Mark Dawson’s group fifteen and its spinoffs.

* DNF
** Stuck with it
*** Good, will probably read another by the same author
**** Would recommend
***** Sticks with me / page turner.
144 reviews
March 14, 2026
The truth will out.

In this novella, Charlie Cooper is set the task (by control) of uncovering Hemlock but the big question is, does Hemlock really exist. You’ll only find out by reading this fantastic short story by Mark Dawson.
70 reviews
March 20, 2026
Following Charlie Coopers adventures is a must for me. Mark Dawson writes a great story and I was disappointed with this one. Plenty of twists and turns and actions. I recommend reading this book, it's great.
27 reviews1 follower
March 5, 2026
Another Winner!

Just love this series. Cooper is at his best when he takes on impossible missions.

Cannot wait till the next one.
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1,055 reviews5 followers
March 10, 2026
Another great Charlie Cooper thriller. He keeps the intrigue up and makes you want to find out what’s next, a great trait.
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640 reviews9 followers
March 16, 2026
Very short novella that only took a couple hours to read. The usual well-crafted action thriller from Mark Dawson, but no time for any subtlety or depth. Wham, Bam, thank you Mam!
Displaying 1 - 11 of 11 reviews