Eliminate the Impossible - Alistair Duncan Eliminate the Impossible is a very enjoyable book, and a well-researched one at that. It offers a wealth of information that would interest both novices and well-versed Sherlockians alike.
As the author mentions in the book, it is better if the original books are read first, but only a passing knowledge is really needed (you could probably even get by if you’ve watched the Jeremy Brett television adaptations).
I feel it is the perfect companion to Arthur Conan Doyle’s Sherlock Holmes stories.