To most people, including myself, the prospect of reading a Victorian thriller/detective novel would not be immediately very appealing, but this remarkable novel was a revelation. It has pace, tension and strong characterisation. The author's technique of relating the story in the first person by a succession of the characters, both major and minor, results in a subtle shift of view and emphasis. I can see how the book created such a sensation when it first appeared and it deserves to be read more widely today.