Finished "Cradle of Saturn" by James P. Hogan. This is a Baen ebook that I originally bought in May 2000 (yes, I do have a long reading list

). This is an "end of the world" story based on the (crackpot) theories of Velikovsky. An Earth-size body is ejected by Jupiter and falls into the inner solar system. Will it hit the Earth and kill everyone?
A silly conjecture, but a good story.