Larkin (The Tribune) picks up the reins for the fifth entry in the Ludlum-spawned Covert-One biotech series (The Altman Code; etc.), bringing to the task a solid intelligence, some really scary nanotechnology and a writing style that sometimes lapses into cliché but always gets the job done. FBI Deputy Assistant Director Kit Pierson and her CIA counterpart, Hal Burke, are secretly working on an operation to destroy the Lazarus Movement, an environmental group run amok. Once a legitimate organization, the Lazarus Movement has been taken over by an evil scientist whose goal is-you guessed it-world domination. Thrust into the middle of this deadly struggle is series hero Lt. Col. Jon Smith, M.D., a scientist and operative for Covert-One, a super top-secret intelligence unit. When the Lazarus Movement's attack on a biotech lab releases a deadly brew of nanophages, microscopic killer devices that turn those unlucky enough to inhale them into piles of "reddish liquid sludge," some start to think that the movement's diabolical leader envisions a vastly depopulated world that he can redesign into an environmental paradise. The action careens from continent to continent, with the bad guys always a few steps ahead of the heroes. Eventually, everyone ends up on an island in the Azores, where, after a deadly firefight and some last-minute reversals, the inevitable conclusion arrives. Hand-to-hand action, intriguing science and plot speed will keep most techno-thriller readers nailed to their seats.