This cover is great although it kind of represents only half the story, which begins with a bunch of witchcraft and sorcery from centuries ago. Then the narrative shifts to the modern day, super-computers and a sort Ghost In The Machine theme. Oh, and there’s a haunted German U-Boat from World War 1 – a part of the novel that’s based on a true story. You can find out more on my The Devil’s Numbers page here.