It is hard to rate this book. From the onset the historical, period criminal cases held my attention as it would for any "collector of odd knowledge". Where E.J. Wagner failed was respectable cross-referencing of fictional writing Conan Doyles character Sherlock Holmes and how the two were distinctly tied together.
Breaking the chapters up by forensic/criminal science and procedures and how they developed through history were well researched, as noted by the multi-page bibliography. What was lacking was the cohesive binding of Sherlock Holmes and said science. Yes there were some good cross-referenced examples but far too little for the 212 page print. The greater irritant and distractor was the vocabulary. Understanding that my word reservoir is limited I felt that Wagner inserted unnecessary pompous words that ruined the reading flow. To be fair here are just a few examples of word choice. If these words are standard grammar then I apologize. Here are a few examples, Charnel, gibbets, gelid, reticent, atavistic, purloining, tallow, malodorous, scion, exsanguinated ...
To end on a positive note, the book, as earlier noted has some interesting historical facts concerning criminal, investigative, and forensic practices.
My knowledge was expanded by the case evidence presented in dactyloscopy (fingerprints), phrenology (cranial evaluation), graphology (handwriting analysis), and a few more forensic first I am unable to remember at this time.