The #1 New York Times-bestselling series returns-and the stakes haven’t been higher.

Charlie Castillo’s magic formula unit has been disbanded-but it doesn’t imply he’s out of business. As knowledge has painfully proven him, there are many things the cleverness community can’t perform, won’t perform, or doesn’t prosper, and he has the men and assets to help set things right.

But the first opportunity, as it pertains, is stunning: A FedEx package occurs, bearing photos of barrels containing a few of the most dangerous biohazard materials on the planet, which were likely to have been demolished throughout a raid on a secret Russian stock in the Congo. That has them, and what do they need? Castillo has a feeling he’s not going to like the answers.