Black sun - Graham Brown

From Graham Brown, co-author of the New York Times bestselling thriller Devil's Gate with Clive Cussler, comes Black Sun . . .

In the heart of the Amazon, NRI operative Danielle Laidlaw makes an incredible discovery: a translucent Mayan stone generating massive waves of energy while counting down toward the infamous apocalyptic date: December 21, 2012. And somewhere, there are three more just like it.

What power will be unleashed if all four stones come together? Who created them-and who has them now? Using a cryptic Mayan map and a prophecy that points to the end of the world, Danielle and her team race toward answers. But one staggering question remains: Were these artifacts meant to save us-or to destroy us once and for all?