The Shanghai Factor by Charles McCarry Mysterious Press-Grove/Atlantic, Inc., $26.00, 292 pages, ISBN 978-0-8021-2127-1 Here’s a true confession: I have been fascinated by spies, espionage and tradecraft ever since the 1950’s when I read that first issue of Mad Magazine and was introduced to the iconic Spy vs Spy cartoon strip with it’s two identical antagonists, battling to a constant and eternal draw.  From then on, I have read