Sherlock Holmes: Before Baker Street
The book is edited by David Marcum and published by Belanger Books. Both Marcum and Derrick Belanger also have stories in this collection.
I'm a Sherlock Holmes fan, but anyone who loves mysteries would like this book, so I'll give you a link RIGHT HERE now, while I think of it.
Meanwhile, here is my review that I posted at Amazon. Hopefully it will whet your appetite.