 Several of Cahill's books center on the infamous Salem Witch Trials and related topics, such as accounts of the Salem "Witch Dungeon" and colonial era crime and punishment.Cahill was born and raised in Salem, Massachusetts and also wrote several auto-biographical books, one recounting his experiences as Sheriff, and another relating tales of his childhood growing up in New England during World War II.Cahill's most widely distributed lore and histories are mostly in the form of small books that can still be found in large quantities within souvenir shops located at tourist attractions throughout New England.