"The Mark" is a Christian fiction novel written by Jerry B. Jenkins and Tim LaHaye, published in 2000 as part of the "Left Behind" series. The story is set in the near future, after the Rapture has occurred and millions of Christians have been taken to heaven.
The main character, Rayford Steele, is a pilot for Pan-Continental Airlines who has been left behind. Along with his daughter Chloe and journalist Buck Williams, Rayford begins to investigate the events of the Rapture and the rise of the Antichrist, Nicolae Carpathia.
As Carpathia consolidates his power and begins to establish a one-world government, he introduces a new form of identification, known as "the mark." This mark is required for all citizens to buy or sell anything and is seen by some as the fulfillment of the biblical prophecy of the Mark of the Beast.
Rayford, Chloe, and Buck must navigate this dangerous new world while also trying to spread the gospel and resist the forces of evil. As they uncover more about the true nature of the Antichrist and his plans, they must decide where their loyalties lie and how they can best serve God in a world that has been turned upside down.
"The Mark" is a fast-paced and suspenseful novel that explores themes of faith, courage, and the battle between good and evil. It is part of a larger series that imagines what would happen if the biblical prophecies of the end times were to come true.