Detective Eileen Reed — “the savviest heroine since Kinsey Millhone” (Carolyn Hart) returns in this shattering thriller by the author of Ground Zero…

After a freak Colorado earthquake, two people are found murdered. Detective Eileen Reed and her partner are called to investigate. But as Eileen races to uncover the pieces of the puzzle, she is confronted with a frightening connection between the murders and the tremors — and the possibility that this earthquake was not an act of God. And as more quakes continue to shock Colorado’s San Luis Valley, a sinister plot of government conspiracy and man-made mayhem begins to unravel…