Rattler

Randall Foster was a young school teacher who got dragged into a deadly clash of clans. When the dust settled, the teacher was hand-picked by a covert agency called The Service. Foster soon has a new career, a code name "Rattler," and a stubborn horse. In a mild-mannered disguise, Rattler comes to Clearview, Kansas, in search of a depraved killer - and walks straight into his crosshairs. Now Rattler must turn from secret agent to bold-faced fight...