An excellent primer on the critical thinking skills of Sherlock Holmes. How he was able to deduce or discover how each of the crimes were committed. Each chapter details the methods Holmes would use to help him learn things and how he made those discoveries in detail by presenting those actions or thought schemas work in finding details in the minutae.

This is a pretty spiffy primer on how to be able to deduce with logic and knowledge how crimes have been committed both on paper and in real world events. I would definitely recommend it to fans of Sherlock Holmes or mystery readers. It should also be used by those people writing mysteries to help organize details of the crime and how forensic sciences of the Victorian/Edwardian era were done, as well as a useful primer on how most modern forensics got its start and help with crime scenes in their stories or novels.