"Berlin. 1963. The height of the Cold War. An early morning spy swap, not at the familiar setting for such exchanges, or at Checkpoint Charlie, where international visitors cross into the East, but at a more discreet border crossing, usually reserved for East German VIPs. The Communists are trading two American students caught helping people to escape over the wall and a lower level CIA operative. On the other side of the trade: Martin Keller, a physicist...

A disgraced ex-CIA operative must return to the field with only his ex-wife as his handler in this electrifying thriller from a former intelligence officer. A single well-placed American asset has kept Iran's secret uranium enrichment from hitting weapons-grade. For the last decade, a mild-mannered Iranian physicist has enabled a CIA hack into software controlling Iran's gas-centrifuge arrays. But now the saboteur has gone dark, off grid-and he's...