The first volume of what will be a multi-book saga: Tom Swift faces two parts of an old comet that have started heading toward Earth. The news media attempts to stir up a really big panic about it all, yet not very many astronomers are certain that it isn't just a tempest in a teacup.Until the day it turns out to be much more than that.While governments dither and scientists endlessly debate, and while religious zealots want people to just give up...