Conspiracy Game (GhostWalkers, #4)

GhostWalker Jack Norton is a genetically enhanced telepathic sniper on a mission to rescue his brother in the jungles of the Congo. Then he meets Briony, a beautiful rebel on a mission of her own-and hiding secrets that a shadowy enemy would kill to discover.

from the back cover
Jack Norton is a GhostWalker, a genetically enhanced sniper with a merciless sense of justice, a phantom welcomed by the anonymity of the night. But a mission to rescue his brother in the jungle has left him vulnerable to rebel forces. His only salvation is his power of telepathy. Then he meets Briony, an unusual beauty on a mission of her own. But they share more than the sweltering heat...

Briony shares the GhostWalker powers. Yet she's different. She doesn't know what she is, or what she's capable of. But her enemies do. And Jack and Briony's flight will take them into a frightening conspiracy of mind and body -- across the globe and into the heart of darkness, where the shocking truth is something neither of them could have foreseen -- or can escape.