The Moscow Sleepers by Stella Rimington

Moscow Sleepers is the latest in the excellent "Liz Carlyle" series. Liz works for British intelligence and gets involved in a case with two Russian "sleeper" agents who were stationed in Germany. It appears that the operation they were working on reached all the way to England and America and it takes the team a while to untangle everything. It's a fast-paced good read--though Rimington needs to get an editor who knows how Americans talk. "Standing in the queue at the car-hire" is not something your average American traveler would say. Aside from that small quibble, I can't wait to see what Liz and the gang are up to next.