I went back to reading The Penguin Complete Sherlock Holmes after Ramadhan reached its happy conclusion and now have around fifteen tales left to go before I can say I have completed the canon. Unfortunately there's something of a critical consensus that by the last couple of collections, His Last Bow and The Casebook of Sherlock Holmes, Conan Doyle had run out of steam - and, possibly, real interest in his creations - and was running on empty. I'm five stories into the penultimate collection and I can see what the critics mean.
But having said that I must say that the fourth of the novellas featuring the Great Detective, The Valley of Fear, which I read back in February, struck me as being the best of the bunch. This is despite the fact that like A Study in Scarlet and The Sign of Four it features the clumsy telling of an extended back-story after Holmes has solved the initial mystery. In this case, though, there's a genuine puzzle as to how exactly the characters in the back-story relate to those in the first half of the murder mystery, and the pay-off of the ending is strong and satisfying. Plus the writer invests his fearful valley in the United States with real menace such that the reader doesn't miss Holmes & Watson at all.
I suspect I won't really miss them either once I get to the end of the clunky, chunky Complete. I seem to have been reading it forever, even though it's been only some seven months (with two long breaks, I hasten to add.)