Looking through the other reviews, I can see that either you love this book or you hate it. I'm in the first group. First, Dibdin shows you that he can capture the flavor of the old Arthur Conan Doyle stories perfectly; then, not content with merely imitating, he adds some disturbing new elements to the legend. In the afterword, he asks you to forgive him. It's heresy, he freely admits, but the heresy of the true believer. An eloquent and accurate summary!