In Benedict's blog post about the release, he made some news about possibly writing more short stories though: he said that if the novella sells well enough, he'll write more short stories & novellas which might make an audio & print edition feasible. He said:
"The last novella was fairly successful, so if I keep on writing these and they keep on proving reasonably popular, I might eventually collect them into a book, at which point it’d probably be worth it to do an audio and paper edition."
Here's the post.
Other links:
EDIT: as of right now on Amazon UK, Gardens is STILL #1 in Urban Gardens (even though it's no longer flagged as such on the listing, it's still listed as #1 if you go to that category), #1 in the "Urban" category and #1 Urban fantasy horror.