I. N. (Isaac N.) Johnston

Isaac N. Johnston is known for Four Months in Libby and the Campaign Against Atlanta, a Civil War memoir first published in 1864. Project Gutenberg lists this as his recorded work, and contemporary catalog descriptions identify it as a firsthand narrative of his service, capture, imprisonment in Libby Prison, escape, and return to the campaign.

Sources available during this search describe him as a captain in the 6th Kentucky Volunteer Infantry. A historical county biography also places him among veterans who later built civilian lives in the Midwest, which helps explain why his writing carries both the urgency of wartime experience and the reflective tone of someone looking back on it.

Reliable details about his wider literary career are limited, so he is best remembered today for this single vivid memoir. Readers interested in personal accounts of the American Civil War often come to Johnston for exactly that reason: he writes from close range, with the perspective of a soldier who endured combat, captivity, and escape.