Mark Ruttenberg, the hero of “An Ordinary Spy” (Bloomsbury, 288 pages, $23.95), Joseph Weisberg’s deft, sour, and clever new novel of espionage, bureaucracy, and disenchantment, is — it is true — a spy. But he’s no James Bond. Just read what happens, or doesn’t, when he shows up for a celebration at the Russian embassy in the country to which, as a novice CIA agent, he has recently been posted. The poor fellow fails to make any real progress with the general who is the most important target in the room, he gets “tipsy” on two shots of vodka, and [...]