This story was the first I've read by Brian Knight, though I've had his novel Feral sitting on my bookshelf for quite a while and just never got around to reading it.
Johnny Junk surprised me. I'm not even sure you could call it a horror story, though it certainly has horror elements. It's a very emotional story that pulls at your heartstrings and really makes you care about the three main characters who brave the junkyard to find their missing children. Knight does an excellent job getting the reader to want these characters to succeed.
In addition to the excellent characterization and the emotional quality of the piece, there's also the action. Most of the story involves the main characters trying to get through the labyrinth of a junkyard, while avoiding booby traps. I was kept on the edge of my seat the entire time and I read the entire story in one sitting.
One of the best things about the story is its opening. Knight starts it off at exactly the right point to make you want to find out what the hell is going on. There are no parts of this story that drag or feel like they were put in to pad the word count.
Endings are difficult to pull off, but Knight succeeds with this one. I found it a very original ending and I very much admired Knight's imagination. It was definitely not what I expected and it lined up perfectly with the set up at the beginning of the tale.
All in all, this a short, tightly written tale. The only thing that disappointed me about it was reaching the end.