Coogan was a prominent author, broadcaster, and newspaper columnist, best known for his long tenure as editor of the now-defunct Irish Press, a role he held from 1968 to 1987. Throughout his distinguished career, Coogan made significant contributions to Irish literature and journalism, penning several influential books such as Disillusioned Decades, The Famine Plot, and On the Blanket. He also authored well-regarded biographies of key Irish figures, including revolutionary leader Michael Collins and political icon Eamon De Valera—works that further cemented Coogan’s reputation as a thoughtful and meticulous writer.

Before rising to public prominence, Coogan received his early education at notable institutions: the Congregation of the Irish Christian Brothers, Belvedere College, and Blackrock College. His literary journey began in earnest when his debut novel, Ireland Since the Rising, was published in 1966—a milestone that marked the start of a prolific writing career. Born into a family with strong intellectual and public service roots, Coogan was the eldest of three children of Beatrice Toal, a former journalist and novelist, and Ned Coogan, who once served as first deputy commissioner of the Garda Síochána.

In his personal life, Coogan married Cherry Coogan, a partner he had known since their teenage years. Together, they built a family and raised six children. However, their marriage faced turmoil when Coogan became involved in a deeply passionate and widely discussed affair with Barbara Hayley, an English professor at St. Patrick’s College. Lasting more than six years, the relationship attracted public scrutiny and ultimately led to the breakdown of his marriage. Tragically, just as Coogan and Barbara looked toward a future together, her life was cut short in a devastating car accident—an event that profoundly impacted Coogan both personally and emotionally.

Despite the challenges in his private life, Coogan remained a central figure in Irish cultural and journalistic circles, with his work continuing to influence readers and scholars alike. Coogan’s legacy endures through his writings and the complex, human story behind the man—Coogan, the thinker, the storyteller, and the public figure shaped by triumphs and trials.