The Rapture: In the Twinkling of an Eye: Countdown to Earth's Last Days vol. 3

The final prequel follows characters Irene and Raymie and others up to heaven where we are shown the events in the Tribulation from heaven's perspective. The book alternates between focusing on events on earth immediately after the Rapture (covering lots of things the authors wished they could have covered in the original volumes) and focusing on characters in heaven and how they view the chaotic events on earth.