Murder in the City: How London Was Built delves into the lives of Irish emigrants working in the building trade in London. When a disagreement between two men working for an Irish subcontractor leads to one of their deaths, their boss and foreman attempt to cover up the murder for personal gain, aided by other members of the crew. The book investigates the reasons behind this disturbing event and the circumstances that led to it, delving into the backgrounds of the men involved and examining the culture of the Irish community in which they lived. Through in-depth analysis, the book seeks to understand the complex motivations and behaviors of these characters and the environment in which they operated.