The real John Ericcson was a Swedish-born American naval engineer and inventor who built the first armored turret warship and developed the screw propeller, both used by the Union during the Civil War. The character with his name is very different in The Iron Maiden by Jim Musgrave. He is a man who is interested only in making enough money from his inventions to enable him to leave with his wife and friends to establish a Utopian colony on Easter Island in the Pacific. This alternative history is mildly interesting when it depicts life in New York City during the early days of the Civil War. The Brooklyn Navy Yard, Barnum's Museum, John Wilkes Booth, along with large helpings of Walt Whitman's writing all make an appearance in the first half of the book.
The plot goes completely berserk in the second half when our hero and friends embark for Easter Island. What they find and how they react might be considered bizarre if it weren't so mind-numbing. Musgrave's writing is at its best pedestrian and can become boring. Many of the characters are caricatures. The author may have enjoyed writing and publishing The iron Maiden. I doubt that most readers will enjoy reading it.
I received an advance copy and this is my honest opinion.