Jerry B. Jenkins, co-author of the “Left Behind” series, is blogging his six-day tour of the Holy Land at www.theultimateresearchtrip.blogspot.com

A documentary film crew will be shadowing Jenkins during his Middle East visit. “Left Behind” co-author Tim LaHaye also will be leading a tour group to Israel at the same time, allowing the filmmakers to capture both authors in locations that they've written about in their novels.

Jenkins said the primary purpose of the trip is for research for a four-novel series titled The Jesus Chronicles, set in First Century Israel.