Eric Ritter4 books in series
The Caliban Program Publisher's Summary
Months after 9/11, a covert arm of the CIA summons young Lieutenant Eric Ritter to Pakistan. Al Qaeda holds an American operative, and Ritter's history with the kidnapper is key to rescuing the operative before it's too late.
While the CIA need Ritter's help, they consider him an expendable asset and throw him into a battle he isn't ready for. Deep inside a hostile city, Ritter will learn what it takes to fight the cloak-and-dagger war against a merciless enemy or die trying.