A.G. Riddle
A.G. Riddle has published 14 books across 4 series. The recommended reading order starts with The Atlantis Gene (2013).
A.G. Riddle is an American author of sci-fi thriller novels, best known for The Origin Mystery series. Before dedicating himself to writing fiction, Riddle spent a decade building and running internet companies. He grew up in North Carolina, where he attended UNC-Chapel Hill and started his first company with a childhood friend. Riddle’s debut novel, The Atlantis Gene, was published in 2013. His thirteen novels have sold over six million copies worldwide and have been translated into twenty languages. In 2023, his standalone novel Lost in Time received the Dragon Award for Alternate History. Riddle lives in Parkland, Florida, with his wife, two children, and a dog.
Shelf & Shadows
Order of Standalone Novels
- TagssuspensethrillermysteryDescriptionFlight 305 from New York to London suddenly loses power and crash-lands. The survivors find themselves in a world eerily different from the one they left. They are stranded. They are hunted. And they may be the only hope for humankind. Five passengers hold the key: Harper Lane, a writer facing a life-altering decision; Nick Stone, a venture capitalist on his way to a secretive project; Sabrina Schröder, a genetic researcher whose work has unforeseen consequences; Yul Tan, a computer scientist on the verge of a breakthrough that could change everything; and Grayson Shaw, the son of a billionaire. As Harper and Nick race to uncover the truth behind the crash, they discover a far-reaching conspiracy. They realize they possess the power to change the future. Or end it.Publication dateDecember 4, 2014Amazon rating4.2/5LanguageEnglishPublisherA. G. Riddle
- Tags---DescriptionSix strangers wake in an underground research facility after a mysterious global event known only as 'The Change.' They discover they are participants in the Extinction Trials, a scientific experiment designed to restart the human race. But the facility harbors a profound secret, and the world outside holds even greater mysteries. As they navigate this new reality, they uncover the true purpose of the trials and the shocking state of the world they left behind. What began as a desperate attempt to save humanity may be leading to something far more complex and dangerous. Can they uncover the truth before it's too late?Publication dateNovember 2, 2021Amazon rating4.2/5Print length432LanguageEnglishPublisherLegion Books
- TagshorrormysterycrimethrillerDescriptionDr. Sam Anderson wakes to find his wife murdered. He and his daughter are accused, the evidence irrefutable. To save her, Sam confesses, accepting exile to the time of dinosaurs, thanks to a machine he helped invent. But his daughter, Adeline, will not lose him too. She embarks on a quest to prove his innocence and bring him home, tasks everyone insists are impossible. As she uncovers secrets, the mystery deepens, stretching across time to a revelation that will change everything.Publication dateSeptember 1, 2022Amazon rating4.4/5Print length453LanguageEnglishPublisherHead of Zeus -- an AdAstra Book
- Tags---DescriptionAfter twelve years, quantum physicist Tyson Klein believes he has found the Theory of Everything, hidden within data from the Large Hadron Collider. He's discovered exotic subatomic particles that appear to originate from beyond our universe, and they carry a signal. Deciphering this message could unlock the secrets of existence and humanity's place within it. But Ty must race against time, because an unknown entity is determined to stop him from understanding the broadcast from the quantum radio.Publication dateMarch 2, 2023Amazon rating4.3/5Print length512LanguageEnglishPublisherHead of Zeus -- an AdAstra Book
- Tags---DescriptionDr. Laura Reynolds once had it all: a job she loved, the respect of her peers, and a clear path forward. But one day, she saw the wrong thing – a colleague's mistake. To cover his tracks, he framed her, leaving Laura with a choice between prison and a secretive research project in Antarctica. Reluctantly agreeing to join, she hopes to continue practicing medicine and eventually reclaim her life. Upon arrival at the advanced facility, Laura quickly realizes that nothing is as it seems. A groundbreaking experiment is underway, one that promises to change everything. As she delves deeper into the mysteries of Antarctica Station, she begins to suspect that something strange is also happening in the world outside. She must now confront the unsettling reality of her new environment and the potential global implications of the research.Publication dateJanuary 15, 2024Amazon rating4.2/5Print length392LanguageEnglishPublisherLegion Books
- TagsmysterysuspensethrillerDescriptionThe ringing in Alan Norris’s ears begins on the day of his wife’s funeral, a familiar tinnitus from his time in the Marines. But this time, the sound shifts, and as it reaches a crescendo, a string of numbers appears: 12122518914208. He dismisses it as a stress reaction, but the ringing is only the beginning. Soon, Alan starts to lose time, minutes at first, then longer stretches. He wakes up next to a dead body, unsure how he got there or what happened to his daughter during the lost hours. This forces him to investigate, revealing he’s not the only one seeing the numbers. This sequence is the key to a conspiracy with consequences for him and the entire world.Publication dateOctober 21, 2025Amazon rating4.3/5Print length736LanguageEnglishPublisherHead of Zeus -- an AdAstra Book
Order of The Extinction Files Books
- TagscrimemysterysuspensethrillerDescriptionThe Arctic Ocean hides a chilling discovery: a sunken submarine, bearing no national markings, holds the remnants of a scientific experiment that could redefine humanity. Meanwhile, in Kenya, a deadly pathogen, eerily similar to Ebola, ravages a remote village, infecting two Americans. Dr. Peyton Shaw, the CDC's foremost epidemiologist, is called to the scene. It's a dangerous, solitary calling, one she has answered countless times before, but this outbreak pushes her to the brink. As Peyton races against the clock, assembling her team alongside international health personnel, she uncovers evidence that this is no ordinary epidemic. It may be the prelude to a vast conspiracy, its tendrils reaching far beyond the isolated African outpost. In Berlin, Desmond Hughes wakes with a blank slate, a dead man on his floor, and a single clue pointing to Peyton Shaw. He knows her, but she offers no answers, only a terrifying possibility: he may be implicated in the outbreak, and perhaps the only one who can halt its devastating spread. Across the globe, the pathogen spreads. Peyton and Desmond, strangers bound by a shared, terrifying secret, must unravel the conspiracy before it consumes the world, unearthing truths someone is desperate to keep buried.Publication dateMay 15, 2017Amazon rating4.3/5Print length720LanguageEnglishPublisherLegion Books
- TagssuspensemysterythrillerDescriptionIn 2003, the sequencing of the human genome marked a historic breakthrough, yet only one scientist grasped its deepest truth: a hidden code poised to redefine humanity's past and future. Dr. Paul Kraus, a seeker of extinct human ancestors, discovered this pattern of changes, a code within our DNA that current technology could not fully decipher. To safeguard his findings, he vanished, taking his groundbreaking work with him. Years later, with the technology to finally unravel the genome's secrets, Kraus's mysterious death leaves his research lost—until now. Dr. Peyton Shaw and her mother possess a fragment of Kraus's work, accompanied by a cryptic message hinting at the remaining pieces. Their pursuit plunges them into a dangerous race against a shadowy group determined to find the code at any cost. This buried secret is humanity's last hope against a global conspiracy and an impending event that will forever alter our existence. Peyton faces an impossible choice: protect the lives of strangers or those she loves—her mother and Desmond Hughes. As time dwindles, her decision will have irreversible consequences, forcing her to weigh the fate of humanity against the people closest to her heart.Publication dateJune 8, 2019Amazon rating4.4/5Print length542LanguageEnglishPublisherLegion Books
Order of The Long Winter Books
- TagsmysteryDescriptionThe last survivors of the human race escaped a ruined Earth, finding Eos, a planet that seemed perfect until the first settlers vanished. As Dr. James Sinclair investigates the lost colony, he uncovers mysterious spheres buried on Eos. Are they the key to finding the missing, or the cause of their demise? Just as James begins to unravel their secrets, a storm batters Jericho City. While Emma fights to lead her people to safety, a new, unseen danger emerges from the chaos. With time running out, James and Emma must make their hardest choice yet.Publication dateNovember 11, 2019Amazon rating4.4/5Print length382LanguageEnglishPublisherLegion Books
- Tags---DescriptionThe Long Winter is over. We survived. But only just. On a ruined world, we rebuild, watching the sky, waiting for any sign of their return. Now, the grid is back. Three vast asteroids have broken free from the Kuiper Belt and started the long fall towards Earth. In two years time their trajectories will converge on our planet. Humanity's last survivors fight against impossible odds, but in their darkest hour, they discover a new hope for survival. Dr. James Sinclair has a plan that could ensure the species' survival, but it comes with enormous risks. Implementing it means navigating a course between two deadly enemies, and his gambit will change the human race forever.Publication dateJuly 2, 2019Amazon rating4.5/5Print length496LanguageEnglishPublisherLegion Books
- TagssuspensethrillerDescriptionWithin three months, ice will cover the Earth. Billions have fled the glaciers, crowding the world's last habitable zones as a cataclysmic war looms. In orbit, scientists running the Winter Experiments discover an anomaly near the sun—a fleeting glimpse of something that shouldn't be there. Meanwhile, a NASA mission launches to investigate a mysterious object drifting toward the sun, found by a probe near Mars. Is it the cause of the ice age, or humanity's only hope? The first contact mission doesn't go as planned, and what the crew discovers out there will change the course of human history—and possibly end it.Publication dateJune 9, 2019Amazon rating4.5/5Print length470LanguageEnglishPublisherLegion Books
Order of The Origin Mystery Books
- Tags---DescriptionOff the coast of Antarctica, a research vessel discovers a mysterious structure buried deep within an iceberg. Entombed for thousands of years, it can't possibly be man-made. A secretive and ruthless cabal thinks they know what it is, and what it means: humanity's ancient enemy is returning. Faced with an extinction-level threat, they believe mankind's only chance of survival means sacrificing 99.9% of the planet's population. Geneticist Kate Warner and intelligence agent David Vale may have a chance to avert the looming catastrophe, but only if they can decode the secrets of the Atlantis Gene and unlock the truth about human origins. But their enemy is close on their heels and will stop at nothing to obtain Kate's research, even if it means killing most of the world's population.Publication dateApril 5, 2013Amazon rating4.1/5Print length640LanguageEnglishPublisherModern Mythology
- TagssuspensemysterythrillerDescriptionA pandemic 70,000 years in the making is poised to change humanity forever. In Marbella, Spain, Dr. Kate Warner awakens to a world on the brink of extinction. The Atlantis Plague has killed nearly a billion people, transforming the survivors at the genetic level—some evolve rapidly, while others devolve. As chaos reigns, two factions emerge: the Orchid Alliance, offering a drug that only treats symptoms, and Immari International, advocating for letting the plague run its course to usher in a new, genetically superior human race. With the world's future hanging in the balance, Kate races to find a cure, believing the answer lies in pivotal moments of human history when the genome mysteriously changed. Her research into the past reveals that human evolution is not what it seems, and setting it right may demand an unimaginable sacrifice. Can Kate unravel the plague's origins and save humanity from its own destiny?Publication dateNovember 18, 2013Amazon rating4.3/5Print length542LanguageEnglishPublisherA.G. Riddle
- TagsmysterysuspensethrillerDescriptionDr. Kate Warner believed she could cure the world, but she was wrong. The Atlantis conspiracy runs deeper than she ever imagined, and now humanity faces a threat beyond comprehension. With civilization on the brink of collapse and her own time running out, a coded message offers a glimmer of hope. Meanwhile, Mary Caldwell, who has spent her life searching the stars, is drawn into an ancient struggle with stakes far greater than she could have foreseen. She must choose her allies carefully, for there is no safe haven. Dorian Sloane, a pawn in Ares's mysterious game, is unleashed to hunt down Kate and David Vale. As Ares unleashes a cataclysm that reshapes the world, the true nature of the threat to humanity is revealed. Now, Dorian embarks on a final mission to find and destroy them, promised his own salvation on the other side. Pursued by Dorian, Kate and David race through the remnants of Atlantean technology, seeking answers in the past of a civilization whose secrets might be humanity's last chance.Publication dateMay 15, 2014Amazon rating4.3/5Print length378LanguageEnglishPublisherA.G. Riddle
Frequently Asked Questions about A.G. Riddle
A.G. Riddle's books are best read within their respective series. For his standalone novels, the publication order is Departure (2014), The Extinction Trials (2021), Lost in Time (2022), Quantum Radio (2023), and Antarctica Station (2024). If you wish to read his series, begin with The Origin Mystery series: The Atlantis Gene (2013), The Atlantis Plague (2013), and The Atlantis World (2014). Next, read The Extinction Files: Pandemic (2017) and Genome (2019). Finally, read The Long Winter series: The Lost Colony (2019), The Solar War (2019), and Winter World (2019). This order ensures you follow the publication timeline and the interconnected narratives within the series.
A good starting point for A.G. Riddle's books is with The Origin Mystery series. This series includes The Atlantis Gene (2013), The Atlantis Plague (2013), and The Atlantis World (2014). This was his debut series and introduces many of the themes and pacing found in his later work. Alternatively, his standalone novel Lost in Time (2022) offers a complete story and can serve as an introduction to his writing style.
While some of A.G. Riddle's books can be understood on their own, reading them in order, particularly within their series, is recommended. The Origin Mystery series, The Extinction Files, and The Long Winter series have interconnected plots and characters that are best experienced sequentially. The standalone novels, however, do not require prior reading and can be enjoyed independently. Understanding the progression within the series will enhance the reading experience and the appreciation of the author's developing narrative style.
A.G. Riddle writes both standalone novels and series. His standalone novels include Departure (2014), The Extinction Trials (2021), Lost in Time (2022), Quantum Radio (2023), and Antarctica Station (2024). He has also written several distinct series: The Origin Mystery series (The Atlantis Gene, The Atlantis Plague, The Atlantis World), The Extinction Files (Pandemic, Genome), and The Long Winter series (The Lost Colony, The Solar War, Winter World). This variety allows readers to choose between self-contained stories or more extensive narrative arcs.
A.G. Riddle has written a total of thirteen novels across his standalone works and series. His published works include the standalone novels Departure, The Extinction Trials, Lost in Time, Quantum Radio, and Antarctica Station. He is also the author of The Origin Mystery series, which comprises The Atlantis Gene, The Atlantis Plague, and The Atlantis World. Additionally, he wrote The Extinction Files series, consisting of Pandemic and Genome, and The Long Winter series, which includes The Lost Colony, The Solar War, and Winter World.
The first book A.G. Riddle wrote was The Atlantis Gene, published in 2013. This novel is the first book in The Origin Mystery series. It marked his debut as a fiction author after a decade spent building internet companies. The Atlantis Gene established his career in science fiction thrillers and set the stage for the subsequent books in the series and his later works, introducing readers to his characteristic blend of suspense and scientific concepts.
A.G. Riddle's most recent book is Antarctica Station, published in 2024. This is part of his order of standalone novels. Prior to this, he released Quantum Radio in 2023. Antarctica Station continues his exploration of science fiction themes, offering a new narrative for his readers. The publication of Antarctica Station adds to his extensive catalog of science fiction thrillers.
A.G. Riddle writes science fiction thriller novels. His books often incorporate elements of suspense, mystery, and speculative scientific concepts. He explores themes such as global pandemics, artificial intelligence, the origins of humanity, and survival in extreme environments. His writing is characterized by fast pacing and intricate plots, designed to keep readers engaged with thrilling narratives.
We verified the reading order for A.G. Riddle's books by cross-referencing official publication dates, ISBN databases, and publisher catalogs.
Last verified: July 2026
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