The Rift - Area 51: the Nightstalkers

Book 3 in the Nightstalkers series. Ever since the first Rift opened in Area 51 in 1947, exposing the world to deadly beings of pure energy, only the Nightstalkers have stood between humanity and complete annihilation. But as the decades have gone by, whatever power controls the Rifts seems to be getting smarter, as if refining an ultimate plan... An old ally alerts the Nightstalkers to a resurgence of Rifts in Tennessee, near one of the teams first major skirmishes with the seemingly inexhaustible threat. Though still licking their wounds from their latest mission, the Nightstalkers know theres no one else remotely prepared to battle these