While the physical book is not yet available (though you can pre-order it for delivery at the end of last month), you can buy Tales Of The Great Detectives now in DRM-free epub and mobi (Kindle) formats.
It has the best short story I’ve ever written, and seven more great short stories about the various Holmeses and Watsons in the City Of The Saved, the city at the end of the universe from the Faction Paradox books, where every human who ever lived — and many that didn’t — has an immortal second life. It’s edited by Philip Purser-Hallard, one of my favourite writers, and is just superb. Buy it.
(Incidentally, for those who do buy the ebook, there’s a minor formatting error in my story that may cause confusion. The two paragraphs that start “‘These pictures”, and the three starting with “From the 1950s” should be formatted differently to show they’re quotes from other sources. Having seen the copy-edited manuscript, I don’t think this will be a problem in the physical book, and it’s certainly not a major enough thing that you shouldn’t buy the ebook.)