Left Behind: The Kids, vol. 21 & 22, by Jerry B. Jenkins and Tim LaHaye. (and to be fair, Chris Fabry).
I have read all of the books in the LB series, and even the three prequel novels. And I am now more than halfway through the kids series. As I have posted here before, once I start a series, I am in for the long haul. The theology behind the novels is a bit wacky, and the stories are waaaay too stretched out (the original 13-book series was planned as a trilogy), but there is no denying their place in modern evangelical culture.
The kids series follows the youngsters involved in the events, some of whom are kids of characters that appear in the adult series. As the series has moved on, the overlaps with characters and events from the adult series have become less common. But the timeline is the same, and key worldwide events happen in the same order.
With these two, the same basic things are happening -- lots of running, lots of worrying, lots of faith, and a little bit of character development.