It's a very fine novel. As an expert on the Edalji family, though, I spent the whole time thinking about the extent to which it reflects the historical record. There are points at which it departs deliberately from actual events, and there are points at which there are (I think) unwitting distortions and mistakes. For a critique of the book in these terms, as well as a comprehensive account of George Edalji's case, see my 'Outrage: The Edalji Five and the Shadow of Sherlock Holmes'.