Dr Napier is an astronomer at the Armagh Observatory in Northen Ireland who specialises in the danger posed by near Earth asteroids. He weaves this knowledge into a gripping story.

"The only hope of averting catastrophe lies with an elite team of the world's top astronomers and astrophysicists, gathered secretly at Eagle Peak Observatory, Arizona. They have five days to identify the asteroid - codename Nemesis - and stop it ...

And the key to stopping it it lies in the pages of a Latin manuscript written almost four hundred years ago."