A.G. Riddle builds the kind of high-concept science fiction thrillers that demand to be finished in a single sitting. His specialty is the extinction-level premise executed with relentless forward momentum — Winter World drops you into a civilization slowly freezing to death and never lets the tension slack, while the Origin Mystery trilogy escalates from archaeological mystery to full-scale cosmic horror with each installment. Riddle's prose is lean and propulsive, prioritizing plot velocity over literary texture, which makes him ideal for readers who want ideas-driven fiction without the padding. His scenarios borrow from hard science — pandemics, genetic engineering, solar collapse — but he keeps the science accessible and the human stakes front and center. If you're the kind of reader who finishes one book and immediately reaches for the sequel, Riddle's series are perfectly engineered to keep you doing exactly that.
The Extinction Files • Book 2
by A.G. Riddle
Narrated by Edoardo Ballerini
Hidden DNA sequences hold humanity's survival secrets in this pandemic thriller conclusion, where genetic codes reveal both our origins and final hope.
The Extinction Files • Book 1
by A.G. Riddle
Narrated by Edoardo Ballerini
Global pandemic conspiracies and evolutionary manipulation schemes get the full thriller treatment from Edoardo Ballerini, who handles the dense scientific exposition and international scope with clarity.
The Long Winter • Book 1
by A.G. Riddle
Narrated by Edoardo Ballerini, Amanda Leigh Cobb
Earth freezes into a new ice age while humanity discovers a mysterious object near Mars—but are they looking at extinction or salvation? Ballerini and Cobb capture the desperation perfectly.
by A.G. Riddle
Narrated by Ray Porter
CERN's particle accelerator reveals signals from parallel universes where humanity faces extinction, launching a physicist into interdimensional conspiracy and cosmic-scale stakes.
The Origin Mystery
by A.G. Riddle
Narrated by Nicola Barber, Scott Aiello
Flight 305 crashes in the English countryside, stranding five strangers in a mystery spanning past and future. Nicola Barber and Scott Aiello alternate perspectives in this twisty adventure about power, memory, and fate.
The Origin Mystery • Book 3
by A.G. Riddle
Narrated by Rayner Gabriel, Jonathan David Bullock, Nora Achrati, Kimberly Gilbert, Wyn Delano, Richard Rohan, Joel David Santner, Stephanie Németh-Parker, Danny Montooth, Morgan Dalla Betta, David Cui Cui, full cast
Riddle concludes his Origin Mystery trilogy with humanity's final gambit involving deep space signals and ancient Atlantean technology. The full cast brings epic scope to this civilization-spanning finale.