Well, the full title of this book is Assassins: Assignment: Jerusalem, Target: Antichrist, and it is the sixth installment of the Left Behind series. Not surprisingly this book is about a fugitive's goal to kill the Antichrist named Nicolae Carpathia.
Rayford Steele is named a "believer" in the book, further he is an international fugitive as he struggles with the goal. Readers are left wondering if it is okay with God, if the person you are killing is the Hitman of the devil.
At the same time the character of Carpathia is really busy as well. Carpathia is building roads, satellite systesm, phone systems, and anything that wil
l help the Antichrist be the most powerful person in the world.
There is also the really suspicious character named Hattie who used to be a big fan of the Antichrist but now claims to be a believer. Most of the other characters cannot believe Hattie such as Buck Williams (who is the writer for the famous magazine called The Truth, which is preaching to all the believers),
Doc, Chloe, and Tsion.
In conclusion, the whole book is full of suspense in regards to the Antichrist and the believers. There is a huge disaster at the very end, where God unleashes his might. The good always wins.