The Ascendant by Drew Chapman Simon & Shuster, $25.00, 388 pages, ISBN 978-1-4767-2588-8 Anyone who’s watched television lately knows that the most interesting man in the world is busy selling Mexican beer . . . but have you ever wondered just what the smartest man in the world is up to?  Well, wonder no more . . . the MBR has the answer for you . . . he’s