Best A.G. Riddle Books

Winter World

The Long Winter • Book 1

by A.G. Riddle

Riddle traps humanity between a mysterious ice age and an alien object drifting toward the Sun, building tension through competing theories about whether it's humanity's doom or deliverance.

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Riddle traps humanity between a mysterious ice age and an alien object drifting toward the Sun, building tension through competing theories about whether it's humanity's doom or deliverance.

Pandemic

The Extinction Files • Book 1

by A.G. Riddle

What starts as a race to contain a deadly outbreak becomes something far more sinister when investigators realize the pandemic might be a deliberately engineered step in human evolution.

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What starts as a race to contain a deadly outbreak becomes something far more sinister when investigators realize the pandemic might be a deliberately engineered step in human evolution.

Genome

The Extinction Files • Book 2

by A.G. Riddle

Ancient secrets buried in human DNA could save humanity from extinction, but only one scientist knows what's really written in our genetic code.

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Ancient secrets buried in human DNA could save humanity from extinction, but only one scientist knows what's really written in our genetic code.

The Atlantis World (Origin Mysteries)

The Origin Mystery • Book 3

by A.G. Riddle

A mysterious deep space signal might hold humanity's salvation and the truth about human origins as Riddle concludes his trilogy about ancient Atlantean intervention in evolution.

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A mysterious deep space signal might hold humanity's salvation and the truth about human origins as Riddle concludes his trilogy about ancient Atlantean intervention in evolution.

Quantum Radio

by A.G. Riddle

Dr. Tyson Klein discovers that CERN's data contains messages from dying alternate Earths, revealing a multiverse-spanning threat that makes our reality the final hope.

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Dr. Tyson Klein discovers that CERN's data contains messages from dying alternate Earths, revealing a multiverse-spanning threat that makes our reality the final hope.

Departure

The Origin Mystery

by A.G. Riddle

A London-bound flight loses power and crashes, plunging five strangers into an adventure that will determine the world's fate. This propulsive thriller weaves together time, memory, and the consequences of ambition.

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A London-bound flight loses power and crashes, plunging five strangers into an adventure that will determine the world's fate. This propulsive thriller weaves together time, memory, and the consequences of ambition.