Tim Lahaye and Jerry B. Jenkins
So Nicolae is back- raised from the dead and now the world is good and ready to bow down to him. Most of the world, anyway. For the Tribulation Force, life continues to become harder as they resist Carpathia's "one world" religion and government...and the mark that all people must receive to buy or sell. Resistance means death.
So now we're to the point where things are really getting bad. And stressful. Of course, if you've gotten this far in the Left Behind series, The Mark won't be much worse for the characters than in the other six books. But be prepared anyway!