After seeing the excellent new Sherlock series on the BBC, I decided it was time to read this novel - the loose base for the first episode of the series.
And I have to say: the series is better than the book. The first part, a real detective story, does not disappoint: a well-written page turner that really shows of Sherlock Holmes' intelligence, but also his negative points. The relationship with other characters, for example Watson and Lestrade, is also well described.
However, the second part, some "historical" fiction about the Mormons that explains the motivation of the killer, is utterly boring and completely unnecessary.
Doyle also wrote short stories about Sherlock Holmes, and this novel would have been better if it had been one of those.