City of Bones — C.E. Martin

Something is eating the men and women of a remote Nigerian oil boomtown--dissolving the flesh right off their bones. When a World Health Organization team is devoured in their hazmat suits, the U.S. military sends in a team of inedible warriors: the Stone Soldiers of Detachment 1039. Made of living stone, these formidable special forces operatives are ready to fight any enemy--large or small. But are the newly-petrified soldiers really ready for an invisible enemy numbering in the billions?