That set is genuine, but I don't remember which publishing house it was from. It seems that it was printed only once.
There is no reprint, but it is out. I have been looking for this set of books for many years, and it was still in the second-hand book market a while ago.
I saw a copy of 19, but others bought it first. If you have time, you can go to the second-hand book market more often, maybe.
Yes Besides, I haven't seen this set of books on the Internet.