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Sam Reilly #33

Abyss Codex:

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In the Strait of Gibraltar, a pod of six orcas launch a coordinated attack on the Céleste Mistral, a 50-foot sailing vessel – sending it to the depths.

Along the Amazon River, pink dolphins exhibit a never-before-seen behavior, forging an enigmatic bond with an ancient, isolated tribe.

On the seabed of the Clarion-Clipperton Zone – a 2.32-million-square-mile stretch of ocean between Hawaii and Mexico – a deep-sea mining operation begins harvesting billions of tons of polymetallic nodules, promising to revolutionize the extraction of precious metals.

Three seemingly unrelated events. One hidden code that binds them together.

And Sam Reilly must decipher the connection – before the balance of life on Earth is irreversibly altered forever...

242 pages, Kindle Edition

Published June 4, 2025

105 people are currently reading
25 people want to read

About the author

Christopher Cartwright

102 books245 followers
Christopher Cartwright writes spellbinding mysteries and suspense novels. Often with a backdrop of ocean adventure. Born in 1983, he has a background as a paramedic, and is an avid sailor and SCUBA diver.

He holds degrees in paramedics, nursing and emergency management.

Chris currently lives in Sydney with his wife and two children.

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5 stars
200 (69%)
4 stars
66 (22%)
3 stars
16 (5%)
2 stars
4 (1%)
1 star
1 (<1%)
Displaying 1 - 20 of 20 reviews
Profile Image for Sheila Walker.
454 reviews1 follower
June 24, 2025
It is said that we know more about space than we do about our seas

This story proves that, the greed of companies who will do anything to reach their own agenda regardless of man or beast. A dolphin trainer hears a tale of pink dolphins in the Amazon. Deciding to take a vacation she must see for herself, taking the chance on an old plain even older pilot she goes to see for herself. Later she contacts Sam and so the adventure begins. Some companies greed has no barriers regardless of man nor beast as Sam and Tom find out. If you have read other Sam Reilly adventures you just must not miss this one. I enjoyed it all and I highly recommend it
Profile Image for Karen Kepner.
363 reviews3 followers
June 9, 2025
Sam and Tom married

Tom and Sam got married to wonderful women. They start to go to their honeymoons, but a crisis occurs near Gibraltar. Then in the Amazon rainforest, and lastly in the Congo.
I didn’t know there were pink dolphins, or that hippopotamus is a relative to dolphins. And there is, of course, trauma to one of the crew. And the Abyss Codex is cracked by Sam and Tom. Thoroughly enjoyed!
Profile Image for Robert.
160 reviews11 followers
September 12, 2025
The Abyss Codex begins with what seems to be several unrelated events involving dolphins and killer whales in several locations – then expands to hippos. There is a bit of a mystery as to what connects all these events in the Amazon, the Congo, the Pacific Ocean, and Mediterranean geographical locations. There is also a sprinkling of environmental and biological science to add realism to the plot.
17 reviews
June 12, 2025
Review of the Abyss Condex

Before I start me book review,I would like to say that Christopher has unique imagination of any author that I have read, The Condex is one of those books that kept you spell bound from start to finished. I would recommend this book to anyone who loves fiction. I’m waiting for the next book.
35 reviews
July 16, 2025
as usual

Well, Mr. Cartwright, you've done it again. FromThe Last Airship to Abyss Codex, you've managed to hold my attention. I love your way with words in describing landscape, etc. My only complaint is that I don't get a lot done when I open one of your books because I am totally fixed on your novel. Thanks for your continued authorship.
Profile Image for Alan Swain.
19 reviews
August 5, 2025
Another wonderful story!

I totally enjoy these Sam Reilly stories, mostly fiction, but enough factual content that adds to the story and the adventure, and always entertaining. You don't have to start with the first one in the series. Pick any one - you can't go wrong.
113 reviews
June 18, 2025
Great Read

I throughly enjoyed this book. It had a good story line and kept me interested throughout the entire story. I recommend reading this book.
52 reviews
June 20, 2025
Another FUN romp!

Sam Reilly is James Bond on steroids!
And he is always surrounded by two items… An improbable situation and at least one beautiful girl.
41 reviews1 follower
June 26, 2025
Another great read

Kept me involved with th story, but time and place shifts happened a little too soon. Just waiting for next installment.
26 reviews
June 26, 2025
Honestly these books are just great escapism. Love the premise and you get what you expect haven’t been disappointed in 30 odd books
23 reviews
July 6, 2025
What an imagination. Dolphins, hippos, killer whales Oh My.
Enjoyed the book as always
Profile Image for Chris.
143 reviews3 followers
July 15, 2025
Another bold adventure

Another bold adventure by Sam and his crew. I enjoyed reading it thoroughly. Cannot wait to read the next adventure.
34 reviews
July 18, 2025
Another great book.

This book, like all in this series, kept me reading well into the night. Good story line with an unexpected finish. Loved it!
671 reviews5 followers
August 5, 2025
Great Ending

Plenty of action, suspense, and never ending action. Sam and Tom take on aliens or something like them. A great change to the usual story.
Profile Image for Margaret.
786 reviews5 followers
August 14, 2025
Ancestral Memories

The 33rd Sam Reilly book is magnificent! Puzzle after puzzle resolving into a story for all time. What a joy to read!

3 reviews
August 16, 2025
not a good story line

Much too technical and disjointed text. Would not recommend this story. All the other Sam Reilly stories had a plot and was easy to follow
23 reviews1 follower
August 17, 2025
wonderful

Great as usual. Happy finally the guys got married. Even the dog has an offspring. Can’t wait for the next book.
41 reviews1 follower
August 22, 2025
great book

I enjoyed this book even if it was a bit far fetched. Look forward to your next book. Thank you.
475 reviews3 followers
September 6, 2025
Great read.

Sam Reilly is at it again. Every time I read one of these books I wonder how Christopher Cartwright comes up with another spellbinding adventure.
Displaying 1 - 20 of 20 reviews

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