Defectors by Joseph Kanon ATRIA BOOKS/Simon & Schuster, $27.00, 290 pages, ISBN 978-1-5011-2139-5 In light of all the nic-nac paddy-whacking that’s been going on for weeks . . . or is it months . . . or, OMG . . . years now about Russia and who did what to whom, and the when, where, why and how until we’re all sick to death of hearing about it, the