The Apocalypse Directive: Douglas MacKinnon

This book was good and really pulled the reader in, but it seemed to end abruptly. There is a conspiracy in the White House. The President and a group of followers of a Christian extremist group work to hasten the end of the world. They have built a bunker at the bottom of the ocean to wait out the nuclear fallout they have plotted to start. The Vice President and a few officials in the CIA have uncovered the plot which was narrowly avoided. The President commits suicide by exploding the bunker killing all those closest to him who were also in it.