Spook Street, Herron - B+

                  In the fourth in the Slough House series, personnel changes are in the air. Catherine has resigned, although Lamb has been sitting on the paperwork. There are two new horses. River is off to France in an attempt to find out why someone tried to kill his grandfather David, an MI5 legend who is losing it. Both River and Lamb worry that the service may be trying to dispatch the old man. Concurrently, MI-5 figures out that the man who committed an act of domestic terrorism had an old MI-5 passport that stemmed from the days when River's granddad was running the show and made a few deals with some folks in France. The mysterious people in France strike against the Slow Horses by taking away River at gunpoint. And amazingly, they send a shooter to Slough House where David is being hidden. Two folks are hit, including one of the horses before the killer is shot. The best so far in my book - well told, insightful, and remarkably witty.