I love to read this author's manga but I want to know why doesn't he continue his previous...

I haven’t checked or anything but it could be this manga and other by this mangaka are complete but the scantalators haven’t finished translating. Most or at least a good many manga that are picked up for translation are already complete but we (those who don’t know the Japanese written language) can’t read them until they are translated. Also mangagkas can also being doing stories for different yaoi manga serializations and since those are basically a collection of different stories by different mangakas they are put out one chapter at a time. So a mangaka may be working on different stories for different publications so that’s one reason a mangaka may have multiple unfinished or ongoing mangas at a time. Also if
It’s not rating well a publication may cancel the continuation of a manga. Those books of manga you see are many times the collection of a bestselling manga into a compilation. I’m not that knowledgeable about the way manga is produced so I may have misspoke somwhat but i think I’ve got the basic gist. I have noticed a lot of the scan groups pick up complete mangas. When you are working on an ongoing manga you are sometimes waiting quite awhile to translate the chapters. Anyways just thought I’d let you know so the reason why you’ll often see multiple unfinished mangas by the same mangaka. If anyone more knowledgeable about this topic wants to correct a mistake I made or fill in any gaps that would be awesome