From Amazon:
"Can a 400 year-old manuscript be the key to saving the world? CIA listening posts have detected evidence of an extraordinary operation by cosmonauts of the resurgent and aggressive Russian regime - a plan to deflect a giant asteroid into a collision course with the United States. The result would be unimaginable devastation, and the West's top astrophysicists are secretly assembled to try and find a way of averting total disaster. But the key to finding the asteroid is an incredible one - its course was predicted in an obscure Renaissance manuscript, the only copy of which has now gone mysteriously missing... "

Snore, don't bother! Imagine Tom Clancy having one of those reaaaally long explanations of something in another one of those military conspiracy things, add a little Armageddon to it and a small helping of Angels and Demons. And you get a fairly boring read with a very improbable and silly plot twist at the end, that makes you go "Huh?". Sorry, put me to sleep several times this week... ( )