Not all predators have teeth and claws.
The deadliest enemies facing the human race have always been the silent and invisible killers. The lethal bacteria and species-killer viruses like Ebola and SARS.
Now there's a new killer on the loose, with the potential to slaughter almost the entire population. But this doesn't look like some new viral variant that's found its way out of the tropical rainforest.
This killer seems to have been manufactured using nanotechnology, and that makes it a much bigger threat than any number of natural viruses.
Natasha Black once again finds herself on the frontline, this time hunting down a killer intent on bringing about Armageddon.
And the only thing she hasn't got is time.