The Quotient Series

The Quotient Series

Join Jack and Sarah as they race to save humanity in this techno-thriller series by Gregory R. Simpson.

The Books

The Quantum Contingent book cover

The Quantum Contingent

A fast-paced techno-thriller weaving together quantum computing, espionage, drone warfare, and global stakes. Follow Jack and Sarah as they uncover a conspiracy that could reshape the world.

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Quantum Time book cover

Quantum Time

The gripping sequel deepens the world of the Quotient series. Available in ebook, paperback, and audiobook — narrated by the author himself.

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Gregory R. Simpson

Gregory R. Simpson

Greg writes fast-paced techno-thrillers blending espionage, technology, and high-stakes action. A former CTO with 37+ years in technology, he brings authentic depth to every page.

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Explore the World of the Books

Dive deeper into the technology, real-world locations, and interactive fiction behind the series.

Technology

Quantum computing, AI, drone swarms, and more — the real science behind the story.

Locations

From Oxford to Ngorongoro Crater — explore every real-world setting on a map.

The Game!

Play Quotient — an interactive text-adventure set in the world of the series.

Blog

Weekly posts on writing, technology, locations, and behind-the-scenes updates.