12th Imam by Joel Rosenberg

The 12th Imam was a "real, flesh-and-blood person who had lived in the ninth century and would some day reemerge to change the course of history."  (84)  He was a direct descendant of Muhammad and vanished when he was still a child.  Some believe he is hidden until the end of days when Allah will reveal him.  Much about his return is unknown, but it is said "he is coming with great power and glory and with terrible judgment..."  (85)
Rosenberg has woven a very good novel around the future revelation of the 12th Imam.  Part of the plot centers around Iran having developed a nuclear bomb.  Another aspect of the novel is the CIA agent the U.S. has in Tehran. 
As followers prepare for the appearance of the long anticipated 12th Imam, Jesus appears to some in Iran who have been contemplating the truth of Christianity.
Rosenberg has crafted a good novel.  My only criticism is that the book seems at times a little "preachy" as some of the characters read Bible passages.  Nonetheless, it is a good way to learn about the possibilities of the  future expectations of Muslims.

Tyndale House Publishers, 512 pages.