Question: What author wrote a book about the death of fourteen peaceful protestors caused by 1 Para? 
Sentence (from "Bloody Sunday (1972)"): Bloody Sunday – sometimes called the Bogside Massacre – was an incident on 30 January 1972 in the Bogside area of Derry, Northern Ireland, when British soldiers shot 28 unarmed civilians during a peaceful protest march against internment.
Relevant evidence: No