The Increment by David Ignatius

My DH recently finished reading this book.  Here is his review:

My dear wife (DW) loves the spy novel genre.  My interest sparked after reading her beloved copy of The Spy Who Came in From the Cold by John le Carre.  Ignatius is a master at writing about the "nothing is as it seems" world of espionage.  In The Increment our protagonist, Harry Pappas, is head of the CIA's Iran Operations Division.  After receiving an unsolicited email from a contact, later determined to be an Iranian scientist, describing Iran's work on developing nuclear weapons, Harry must decide on the authenticity of the information.  Harry is given two weeks to determine the authenticity of the information before the United States plans to bomb the crap out of Iran.  Since the CIA has no assets on the inside, Harry must turn to the British for help. A plan is hatched to bring in the Iranian scientist with the help of a covert ops team dubbed The Increment, a group which doesn't legally exist.  Can the Iranian contact be brought in before it's too late? Is the information for real or a ploy?  I strongly recommend this book to anyone who enjoys a good spy novel.