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Coherence: A Near-Future AI Technothriller

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Ruby fled her father and the oilfields of rural Colorado to study physics in Boston, determined to succeed where her late mother’s career collapsed. Now, as a graduate student developing a breakthrough theory of dark matter, she discovers her advisor has been rewriting her results to serve his own ambitions.

When Ruby falls for Noah, a postdoc recruited into a secretive AI project fighting climate disinformation, her ideas—and her family's past—are pulled into the crosshairs of a new kind of weapon, one capable of shaping what the world believes is true. As her advisor tightens his grip and Noah’s project spirals from whisper campaigns to global sabotage, Ruby realizes she’s caught in a battle for something far greater than her science. To stop the unraveling—of her career, of civilization, of truth itself—she must decide what she believes and what she is willing to sacrifice in a world where reality can be faked at any depth.

435 pages, ebook

Published December 8, 2025

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About the author

Aaron Parsons

2 books4 followers
Aaron Parsons is a professor of astrophysics at the University of California, Berkeley, where he designs and uses radio telescopes to search for the first stars in the universe.

His degrees include an AS from Colorado Northwestern Community College (earned while in high school), a BA from Harvard in Physics and Mathematics, and a Ph.D. from the University of California, Berkeley, in Astrophysics. He has been nationally recognized with awards that include the NSF Astronomy and Astrophysics Postdoctoral Fellowship, the Charles Towns Fellowship, the NSF CAREER Award, and the Presidential Early Career Award for Scientists and Engineers—the “highest honor bestowed by the U.S. government on outstanding scientists and engineers beginning their independent careers.”

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5 stars
37 (64%)
4 stars
8 (14%)
3 stars
6 (10%)
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3 (5%)
Displaying 1 - 20 of 20 reviews
Profile Image for Lucia Kanter St. Amour.
Author 7 books36 followers
August 8, 2026
Coherence is operating at a much higher level than most contemporary techno-thrillers.

This work combines techno-social and climate urgency with wit, emotional intelligence, romance, and a female STEM protagonist navigating the same entrenched gender dynamics women still encounter in male-dominated professional spaces. Parsons understands that ideas alone don't sustain a novel. People do.

For context: I am generally not a sci-fi reader. Quantum mechanics, cybersecurity, advanced systems theory—none of this is naturally my sandbox. I picked up this title because my son is an astrophysics student at UC Berkeley (where Parsons teaches), and had heard about the book. And yet Parsons writes with such clarity and narrative control that I consistently understood the broader stakes and remained fully engaged. That is serious craft, y'all. The novel manages to be intellectually ambitious without collapsing into incomprehensible expository shoptalk.

The characterization is vivid, the architecture of the plot exceptionally disciplined, and the escalation of tension carefully calibrated. The book trusts the reader. It assumes curiosity and attentiveness rather than pandering to the goldfish attention span of the average social media scroller or commercial genre fiction reader—prone to ratcheting up their Goodreads "Read" count with tropey formulaic bilge.

I also want to defend the tennis match scene, which another reviewer criticized as overlong. Completely disagree. The sequence is brief, purposeful, and structurally deft on several levels at once: character revelation, pacing modulation, scene variation, relational dynamics, and thematic echo. If a reader can tolerate extended passages explaining quantum systems but balks at three pages of tennis, I suspect the issue is less length than a lack of patience for thoughtful scaffolding. Put another way: if I can read 400+ pages of quantum-seeped dialogue and narrative, kvetching over 3 pages about tennis strikes me as a bit delicate.

Could it be shorter? Probably. But like Project Hail Mary, this is a standout novel. Fans of Inception, Sapiens, and Wizard of Oz (just ... you'll see) will also appreciate it. Dense in the best sense. It rewards attentive reading and intellectual curiosity while still delivering momentum and emotional investment.

MY RATING PHILOSOPHY:

★★★★★ = Exceptional. A book that teaches me something new, reexamines or illuminates overlooked people or histories, expands my understanding of the world, or achieves unusual artistic originality and lasting impact. A title I actively and enthusiastically recommend to others.

★★★★ = Excellent. Strong craft, compelling storytelling, memorable characters, emotional or intellectual engagement, even if I didn't necessarily learn something new or find it elevating of overlooked or underexamined topics/events/people. A book I would readily recommend.

★★★ = Enjoyable and worthwhile. A solid reading experience with clear strengths, though more commercially predictable, uneven, or limited in originality, complexity, or execution than my four-star reads. A book, if asked, I'd say, "I liked it well enough."

★★ = A meaningful miss. Some compelling elements or ideas may exist, but the execution substantially faltered.

★ = Did not work for me on the level of craft, coherence, readability, originality, or emotional/intellectual engagement.
1 review
December 8, 2025
"Disturbingly plausible" were the first words that came to mind after reading Coherence. The experience of the author is evident in both in the setting and in the solid foundation of the book.

It is a good book for those that like rational actors: Character motivations are consistent, and everything builds on previously given information (yes, that line you just read will have an impact in two or three hundred pages).

I enjoyed reading Coherence and I look forward to future novels by the author.
Profile Image for backy.
20 reviews1 follower
March 4, 2026
Coherence by Aaron Parsons has a timely and intriguing plot: the use of AI and deep expertise in cybersecurity to deal with climate change at (mostly) an unnamed major university in Boston in the near future. There are some interesting characters, natural dialogue with unique character voices, and engaging prose. There’s evidence a lot of effort went into researching and writing this debut novel, and I acknowledged that effort and the book's other positive qualities in my rating. Unfortunately, I couldn't rate it more highly because I believe it has some significant flaws, including one that would have caused me to DNF if I hadn’t promised a review in exchange for a copy of the e-book.

First, I think there’s excessive narrative vs. dialogue and internal monologue, much of which doesn’t add to the story; e.g. three pages of details on a tennis match when three paragraphs would have served the story. Also, what little internal monologue there is isn’t clearly differentiated from the narration.

There’s also way too much unnecessary detail in general, I think, such that it bogs the story down. Yet some important details are delayed, or even missing. For example, we don’t find out until Chapter 6 that two of the main characters are from Colorado, and we never find out what happened to the protagonist’s oft-mentioned mother—just that she “went away” years ago.

The text has several punctuation errors, but more importantly there’s many inconsistencies in the story that indicate more editing was needed, e.g. a westbound train that crosses the Illinois-Iowa border, travels through Nebraska, and suddenly is back at the Illinois-Iowa border.

A much bigger issue for me is that the plot, while imaginative, seems implausible, from both technical and human perspectives. I can’t provide details without spoiling the story, but one example is that a large team of highly-educated, well-meaning scientists seems to have no problem with the fact that millions, perhaps billions, of lives will be destroyed by their actions.

But the biggest problem I have with this novel is the number of times something totally implausible or even impossible happens, as if the author thought, I need for this to happen to advance the story, so by golly, it’s going to happen, often with no explanation about how it happened. I realize that, in a sci-fi novel, the reader may simply need to accept that something like time travel is possible, but not in a novel that’s set in the near future and is based on familiar technology and science, and on human behavior. Unfortunately, this habit spoiled for me what was the biggest twist of the story—one that seemed implausible based on the rest of the book.

NOTE: This book is best suited for Adult (18+) readers due to some language.
1 review
March 27, 2026
Humanity's wanton reliance on oil has precipitated cataclysms both global and personal, and unfortunately, a megaconglomerate in motion tends to remain in motion unless acted upon by an external force.

Coherence is an engaging and prescient exploration of AI, the climate crisis, the scientific method, and truth itself. Parsons reveals in the acknowledgments that he has been working on this novel since well before the LLM age, yet from the relevance of its plot, it feels like it all could have been written in the last month.

Ruby and her mentee Imani grapple with the shortcomings of AI in scientific research while fighting a morally and ethically deficient advisor. Noah's "secretive AI project fighting climate disinformation" tackles the nature of truth: when internet communication channels can be modified all at once to promulgate a single agenda, what can you trust, and how can you know?

A recurring theme in the novel is exponential growth — maybe a virus infects only one host at first, but if each host infects two new hosts per day, there will be a billion hosts infected within a month. The pace of Coherence's plot seems to follow a similar progression — it might feel like it starts a little slow, but things start moving faster than you anticipate, and the pace essentially doubles every fifty pages. After the first third of the novel, it's impossible to put down.

Ruby and Noah lead the story, but the narrative rotates through the viewpoints of a diverse cast of characters who all approach the novel's issues differently. In my opinion, many of these tertiary characters were the stars of the show, and I greatly look forward to the cast's return in Book Two.

Coherence reminded me strongly of Red Mars and The Three-Body Problem — fans of Kim Stanley Robinson and Liu Cixin will not be disappointed.
1 review
December 8, 2025
I bought Coherence for a good friend who enjoys reading sci-fi, and is partial to good writing. I mostly enjoy non-fiction and some literature, but gave the book a quick read. Cutting to the chase, I enjoyed the read and am really looking forward to hearing back from my friend, once he’s read it.

I enjoyed Coherence for a couple reasons: first, it’s a good and well-written story, with a decent twist, and second, I learned a lot. The story reads well and begins to pick up about a third of the way through. I probably could have read it faster - except for that I paused periodically out of necessity, to Google science stuff, and paused - *not* out of necessity, to go down fun rabbit holes about other science stuffs the author describes.

Coherence is authored by a trained astrophysicist, so there is a fidelity to the quantum mechanics / AI that underpins the book, as well as to the general science that's scattered throughout. I found the technical descriptions to be super charming and mostly fun. As an example of the fidelity to ‘general science,’ in one bit, the author describes a gasoline fire that happens in a building … and literally describes the chemical and molecular reactions that cause ‘hydrocarbon chains [to] facture … [to create an] exothermic reaction … [in which the] carbon’s electronic transitions emit blue light, while dust and impurities glow yellow.”

The book is long(ish). And it’s more current-day sci-fi than it is some future / conceptual sci-fi; but that’s part of what made the read especially interesting. The characters are developed nicely. The plot moves along. And my penchant for non-fiction was satisfied by a healthy dose of it through the author’s thoughtful and technically accurate descriptions of quantum mechanics, AI, and other science concepts.
322 reviews4 followers
July 2, 2026
Coherence is exactly the kind of science fiction I love—grounded in real scientific ideas while asking unsettling questions about the future we're rapidly creating. Aaron Parsons delivers an intelligent technothriller that feels less like distant speculation and more like tomorrow's headlines, weaving together AI, misinformation, academia, climate science, and personal ambition into a gripping, emotionally driven story.

What impressed me most was Ruby. She's not the stereotypical action hero; she's a scientist whose greatest strengths are her curiosity, persistence, and integrity. Watching her navigate academic politics, scientific discovery, family expectations, and a rapidly escalating technological crisis makes her journey feel both believable and deeply compelling.

The novel also excels because its technology never overshadows its humanity. The AI systems, climate disinformation campaigns, and questions surrounding truth and synthetic reality are fascinating, but they ultimately serve a story about trust, ethics, and the choices people make when knowledge becomes power. As the stakes expand from one graduate student's research to a global struggle over reality itself, the tension continually builds without losing sight of the characters.

What lingered with me most is the novel's central question: What happens when we can no longer trust what we see, hear, or believe? That idea feels remarkably relevant, making Coherence both an exciting thriller and a thoughtful exploration of one of the defining challenges of our time.

It's a smart, fast-paced novel that will appeal to readers who enjoy scientifically grounded speculative fiction, AI thrillers, and stories where cutting-edge technology intersects with deeply human dilemmas.
Profile Image for Meredith.
21 reviews2 followers
May 4, 2026
I thoroughly enjoyed this page-turner of a technothriller. It blends AI, climate change, astrophysics, academic culture, ethics, and questions about the nature of reality. Several of the characters are quite compelling, including the main character and her young protege. Ruby's relationship with her father was particularly well executed. I found it entertaining as a female scientist reading the novel to see how a male scientist envisions what it is like to be a female scientist. Mostly accurate, I'd say -- unfortunately including some uncannily accurate depictions of common techniques used by sexual harassers. I never felt that Ruby was tokenized, and appreciated her unwavering commitment to seeking truth.

It's a first novel that could have used a bit more editing -- sometimes it is repetitive or whacks you over the head with themes, and a couple of the major plot twists were predictable (but I still enjoyed them since they were well executed). I personally enjoyed the forays into the more technical aspects of quantum physics and cybersecurity. I loved how the various themes were woven between the topic areas and plot threads. Given the timeframe when the novel must have been written, it also felt prescient in a way that bodes well for its staying power as a story.

Here's hoping for a sequel!
739 reviews13 followers
January 8, 2026
Coherence is a gripping and unsettling technothriller that feels uncomfortably close to the present moment. Aaron Parsons blends hard science, emotional stakes, and geopolitical tension into a narrative that explores how truth itself can become a weapon.

Ruby is a compelling protagonist, driven by intellect, grief, and a fierce need to reclaim both her scientific work and her sense of self. The academic power imbalance surrounding her research is rendered with chilling realism, while the parallel AI storyline escalates the novel from personal betrayal into global consequence. What makes the book especially effective is how seamlessly it connects intimate human motivations with large scale technological manipulation.

Parsons does not rely on speculative excess. The AI driven disinformation, climate narratives, and institutional ambition feel plausible, even inevitable, which gives the story its lasting impact. Coherence asks difficult questions about authorship, belief, and responsibility in a world where reality can be engineered, and answers them with tension, intelligence, and urgency.

A smart, timely read for fans of near future science fiction, AI thrillers, and socially grounded speculative fiction.
191 reviews22 followers
December 21, 2025
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🌈Post Description: Blending speculative science with ethical tension, Coherence offers a gripping exploration of what happens when knowledge becomes a battleground. Aaron Parsons places readers inside a world where dark-matter research, AI propaganda, and personal ambition intersect with alarming consequences. Ruby’s fight to reclaim her work and her voice drives a narrative that feels urgent and deeply relevant.

The storytelling is sharp and well-paced, pulling readers through academic intrigue, romantic vulnerability, and global-scale threats with ease. Parsons’ command of scientific detail enhances credibility while never overwhelming the story. The novel’s greatest strength lies in its moral complexity—there are no easy heroes, only difficult choices in a manipulated world.

Thought-provoking and intensely readable, Coherence will appeal to readers who enjoy intelligent fiction that reflects real societal anxieties. It’s a powerful debut that earns its praise and deserves a spot on your bookshelf. 📚⚡
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143 reviews1 follower
January 6, 2026
Coherence is a gripping and intellectually ambitious technothriller that blends cutting edge science with high stakes ethical tension. Aaron Parsons delivers a compelling near future narrative that feels both plausible and urgent, grounding global threats in the deeply personal journey of its protagonist, Ruby. Her struggle to claim ownership of her scientific work while navigating academic exploitation adds emotional weight to an already fast paced story.

What sets Coherence apart is its thoughtful exploration of truth in an age of artificial intelligence and disinformation. The intersection of physics, AI, and climate manipulation is handled with clarity and sophistication, never sacrificing narrative momentum. The escalating stakes from academic betrayal to global destabilization are expertly paced, and the moral questions linger well beyond the final page. Coherence is a smart,immersive thriller that will strongly appeal to readers who enjoy science driven suspense with real world relevance.
1 review1 follower
December 9, 2025
Although it is set in the near-future and is most concerned with the unsettling machinations of a powerful tech-fueled conspiracy, Coherence is very much about our present moment. Its writing ties together many elements - quantum physics, computing, medicine, nature, academics - in a way that deftly illuminates what has led the world to where we are, and where we might be headed next.

It's an often-thrilling, always fascinating book that reminded me of The Martian in the way it weaves (a ton of) real science into the narrative. This is not surprising, as Parsons is a real-life astrophysicist; what might be surprising is how well he has constructed a world and characters that the reader comes to care about, and how polished his prose is. It's the kind of book that entertains you so much you don't even notice how much smarter you feel until after you've put it down. Well worth the read.
Profile Image for Scott Bollens.
Author 10 books10 followers
April 26, 2026
This is a thinking person's book, combining good storytelling and character development with an ample amount of hard computer science and physics. The hard science made it a difficult read at times, but the narrative would pull me back in. Too much repetition regarding Ruby's grievances; this reader would understand her challenges with less words. Effects of powerful AI on society are described at the macro-scale. Book would have been enriched with interludes about how individuals are responding to the 'manufactured truths' and what those actual AI messages were. Book finishes with more questions than answers, opening up narrative to a sequel. Overall, I'm glad to have read this book.
4 reviews4 followers
December 9, 2025
Coherence is a refreshing exploration of misinformation and morality, with fascinating observations of academic life thrown in. The ideas underpinning Coherence are written about in a way such that they are accessible to any reader, but they come together to create a rich and complex dystopian near-future that gets under your skin. A really original, nuanced and gripping story - I found myself really rooting for Ruby, always excited to read the next chapter. What more can you ask of a book than that?
2 reviews1 follower
January 22, 2026
Coherence is truly a masterpiece. It is an incredibly gripping thriller -- engaging enough that I dreamed about it night after night as I read it -- while also addressing many significant issues of our times with complexity and nuance. It is a powerful and thought-provoking book, and I find myself thinking about it frequently, long after I have finished reading it. It is so relevant to today's world, that I would recommend it to anyone -- even to those who don't normally read science fiction or thrillers.
Profile Image for David.
1 review
December 21, 2025
Brilliant and thought-provoking.

This book weaves two of the most critical aspects impacting humanities’ future — human-driven climate change and artificial intelligence — into a gripping human tale. This thoughtful work explores these concepts in the context of higher education, a world in which the author has first-hand experience as a world-leading astrophysicist. I certainly hope that we can read more about this saga in future works.
Profile Image for Scott Shjefte.
2,498 reviews75 followers
June 5, 2026
EOTWAWKI. Oil usage is destroying everything, a group uses AI and human susceptibility to shut down the technological world. Several individuals play key roles but no one is in charge. Ending is non determinant and provides no answers to questions within the story or where the worlds direction finally might emerge. Overall a disappointment where much of the stories' promise could have been achieved.

Borrowed from Kindle Unlimited, read with Alexa using the audio application.
This entire review has been hidden because of spoilers.
1 review
December 8, 2025
Parsons deftly and cannily teases apart many tangled threads of modernity’s perils, and manages, with limpid prose and affecting wisdom, to weave them back together into a cracking yarn. A most impressive debut!
Profile Image for M.Marie.S..
597 reviews1 follower
December 9, 2025
Coherence reads like Weir crossed with William Gibson and Peter Watts, plausible science with cyberpunk and dystopian ramifications. The author is an astrophysicist and a professor so he writes the science accessibly enough for the reader to follow along and feel smart too.
Profile Image for Jennifer Zeitler.
7 reviews
January 22, 2026
Really enjoyed this debut novel, and I'd definitely be first in line to get the next book in the series. Appreciated the detailed and intricate science, well-developed characters, and pacing of interwoven storylines.
449 reviews5 followers
July 7, 2026
Excellent

Although I enjoyed the philosophical snypets in ARCCC memos most. This authors technical knowledge is way beyond what I could follow. I am as they say "technologically challenged".
Displaying 1 - 20 of 20 reviews