The Cradle of Life - Dave Stern

Within the long-lost Temple of Luna, built by Alexander the Great to store his most valuable possessions, Lara Croft discovers a device that leads the way to the deadliest artifact of all time: the legendary Pandora's Box. Hidden for centuries in a place known to the pharaohs as "the cradle of life," the box that once brought life to Earth now contains only a lethal plague. Unfortunately for Lara, a ruthless bioterrorist has uncovered the existence of this weapon as well.
The only person who can help Lara get to the box first is a former Royal Marine — once Britain's finest soldier and now an immoral mercenary who sells his deadly skills to the highest bidder. Once Lara trusted her heart to Terry Sheridan. Now she's not sure if she dares to turn her back on him.
With the fate of the world hanging in the balance, Lara Croft must trust Sheridan once again. And watch him closely, lest he betray her — and civilization itself — one last, catastrophic time.