我只知道在中文网站上来说还有两本，是这本之前写的，不过读者人数要比这本少很多很多。
至于被翻译的作品，很可能只有这一本。
I only know that there are two more books on the Chinese website, which were written before this one, but the number of readers is much smaller than this one.
As for the translated work, it is very likely that there is only this one.
