This is a very respectable little essay collection. Nearly all are about Holmes, despite the charcoal portrait of Doyle which adorns my copy's dust jacket. These include a few novel and thoughtful studies, mixed in with some less-inspired rehashing of traditional topics such as why both Moriarty and his brother were named James. A real chemist's view of Holmes's sitting-room laboratory, and an investigation of the detective's pseudonymous appearances in the adventures of French antihero Arsène Lupin, are highlights.
A lengthy essay on Doyle's relationship with Spiritualism concludes the volume. Though this ultimately has relatively little to say about the contrast between the credulous author and his hyper-skeptical creation, beyond the obvious, the in-depth chronicle of this passion of Doyle's later life is entirely interesting reading by itself.