Books by A.G. Riddle

Geneticist Kate Warner and counter-terrorism agent David Vale are working desperately against the clock to prevent a pandemic 70,000 years in the making. If this plague takes hold, it could change humanity forever...

Geneticist Kate Warner and counter-terrorism agent David Vale have prevented a fierce plague from wiping out humanity - but the struggle to survive is far from over.

After surviving one of the deadliest epidemics in history, Dr. Peyton Shaw has uncovered a global conspiracy that will change humanity forever. Book 2 in the new sci-fi thriller series.

After a mysterious global event known only as 'The Change', six strangers wake up in an underground research facility where they learn that they're part of the Extinction Trials ‿ a scientific experiment to restart the human race. But the Extinction Trials harbours a very big secret.

Against impossible odds, the last survivors of the human race have created a new home on a planet far from Earth. But everything is not as it seems - and they will end up facing their greatest challenge yet. The conclusion to the Long Winter trilogy.

On a ruined world, humanity's last survivors are fighting a losing battle against against an unknowable enemy and impossible odds. They have just one hope for survival. But it comes at an unthinkable price...

A new ice age. A mysterious object in space. And a desperate mission to save humanity from extinction.

A deadly outbreak in Kenya. A conspiracy beyond imagination. And a race to save humanity in its darkest hour.