John G. Nicolay, born on September 9, 1832, in Essingen, Germany, was a prominent American author, journalist, and historian known primarily for his close association with President Abraham Lincoln. Nicolay immigrated to the United States with his family in 1837, settling in Illinois, where he would later develop a deep interest in politics and history. He passed away on February 26, 1901, in Washington, D.C., leaving behind a significant legacy in American literature and history.

Nicolay's early life was marked by a rigorous education, which he pursued while working various jobs to support his family. He attended the University of Illinois and became adept in both English and German literature. His passion for politics and history flourished during his youth, influenced by the tumultuous events leading up to the American Civil War.

Nicolay's literary career is perhaps best exemplified by his collaboration with John Hay on the ten-volume "A History of the Civil War, 1861-1865," which remains a critical resource for understanding this pivotal period in American history. His work as Lincoln's private secretary during the Civil War afforded him unique insights into the president's life and decisions, which he later documented in his biography, "Abraham Lincoln: A History." This comprehensive work is celebrated for its detailed account of Lincoln's presidency and the era's societal challenges.

In his personal life, Nicolay married Helen Nicolay, with whom he had three children. He was known for his strong work ethic, intellectual curiosity, and commitment to preserving the legacy of Abraham Lincoln. His contributions to American literature and history have secured his place as a notable figure in the annals of American writing and scholarship.