Jeremy Robinson - CallSign: King (A Jack Sigler Novella)

The fabled Elephant Graveyard has been discovered. It contains enough ivory to make Ethiopia a wealthy nation. But the cave contains more than physical riches–it also holds the means to control the world. Fifteen scientists enter the cave. Only one leaves.
Jack Sigler, Callsign: King (field leader of the covert, black ops Chess Team) receives a cryptic text from Sara Fogg, his girlfriend and CDC "disease detective". A catastrophic disease has been reported in Ethiopia's Great Rift Valley, but Fogg suspects something more is going on. Her suspicion is confirmed when King's arrival in Africa is met by a high speed assassination attempt.
As King fights against two competing, high-tech mercenary forces, each struggling for control of the deadly discovery, Fogg disappears. Working with the surviving member of the science team that made the discovery, King begins a search for Fogg and the source of the potential plague that takes him back to the Great Rift Valley, back to the Elephant Graveyard, and brings him face-to-face with modern man's origins.
THE CALLSIGN BOOKS: Callsign: King is the first in a series of Chess Team stories being released in 2011. Each of the five books follows a single member of the team and are titled for them; Callsign: Queen, Callsign: Knight, etc, and are co-authored by Jeremy Robinson and five other fantastic authors. The stories take place after the events of THRESHOLD, the third Jack Sigler thriller, but are designed to introduce readers to the series. If you haven't read the novels, no worries. Enjoy the ride!