A fast-paced espionage thriller by Jack Higgins and part of his popular Sean Dillon series. The novel follows former IRA enforcer Sean Dillon, now working with British intelligence, as he faces one of his most dangerous adversaries.

The story begins when a ruthless former intelligence operative, determined to settle old scores, launches a campaign of revenge against those he believes betrayed him. As assassinations and acts of violence escalate across Europe, Dillon and his colleagues are drawn into a deadly game involving terrorism, espionage, political intrigue, and personal vendettas.

Moving between Ireland, England, and continental Europe, the novel combines covert operations, undercover missions, international conspiracies, and relentless action. Sean Dillon must rely on his experience, instincts, and connections to stop a determined enemy before more lives are lost.

Packed with suspense, action, and intrigue, Day of Reckoning delivers the trademark blend of espionage and adventure that made Jack Higgins one of the world's bestselling thriller writers.