A lovely mix between a textbook, and a novel. Margalit Fox lays out the case of Oscar Slater, a Jewish man convicted of a murder he most certainly did not commit. Conan Doyle, through his own deductions and attentiveness to the details of the case, assumed Slater's cause, and was instrumental in getting his sentence commuted (albeit years and years later). I enjoyed Fox's conversational tone amidst lots of evidence and technical vocabulary.
I recommend this book highly for any true crime fans, or Conan Doyle / Sherlock aficionados.