Return of the Old Gods

The modern gods are gone; they have been removed from power by the old gods. The old gods are back: Greek, Egyptian, Norse, Roman, Hindu, Aztec, Celtic, Japanese, Chinese, Babylonian, and many others.
The first thing they do is kill off over 1 billion people who have been judged as Evil. They also eliminate the weapons of all of the militaries, all nuclear power fuel, and waste.
Gordon Anderson was a clerk at a 7-11, and he was (as usual) late for work. That is suddenly the least of his problems.
The world is changing; everything is in turmoil. However, the most disturbing fact may be that his phone now has some new contacts listed in his address book.
The gods of old, the ones that have just judged and executed a billion people and are literally shifting continents like chess pieces. They now have him on speed dial...