From Graham Brown, co-author of the New York Times bestselling thriller Devil's Gate with Clive Cussler, comes Black Rain . . . Covert government operative Danielle Laidlaw leads an expedition into the deepest reaches of the Amazon in search of a legendary Mayan city. Assisted by a renowned university professor and protected by a mercenary named Hawker, her team journeys into the tangled rain forest-unaware that they are replacements for a group that vanished weeks before, and that the treasure they are seeking is no mere artifact but a breakthrough discovery that could transform the world. Shadowed by a ruthless billionaire, threatened by a violent indigenous