A virus released from the permafrost leaves humanity’s survival on a razor’s edge–and Hannah Aldeen’s family in the crosshairs of an unrelenting threat.

Humanity is on the brink of extinction. Half of the population has already perished, and the remaining survivors are divided into two groups–the immune and the Ragers.

Hannah Aldeen thought she had it figured out. Living in her fortress-like home in upstate New York, she’d prepared for the worst that climate change could throw at her. But nothing could have prepared her for the terrifying reality of a global pandemic.

Now with the Omega Corporation hot on her heels, Hannah must fight to keep her family safe from the clutches of a ruthless enemy. She doesn't know why they're after her, but she knows that she will stop at nothing to protect those she loves.

As the clock ticks down and the threat of annihilation looms large, Hannah must make impossible choices and take extreme measures. She'll have to push herself to the limit and beyond, facing danger at every turn in a race against time to save the only thing that matters–her family.

With heart-stopping action and pulse-pounding suspense, Extinction Threshold is a gripping tale of survival in a world gone mad. Hannah's story will leave you on the edge of your seat, breathless with anticipation until the very last seconds.