I could have sworn I'd read this collection of Holmes stories before, but there were a few that I didn't recognize, so maybe I ran into some of them elsewhere. I know I'd read the titular story previously, since I knew the solution, but it's still one of my faves.
Honestly, I read this because I'd just finished watching the new movie, which made it feel like well-written fanfic. Heresy! Loved it.
P.S. There are some reviews of this book in Goodreads that have unmarked spoilers, so I'd avoid the main page if you want to try to solve the cases yourself.