It depends if it's a free book or if you're charging. If it's a paid book, you're allowed to use series with the CC-BY-SA license and if you want to use a story with an CC-BY-NC license (a non-commercial license) you need to have their approval. Failure to do so opens you up to litigation.

Either way, you should message the original authors and remember to properly cite them as this wiki has had issues in the past with 'authors' stealing content.

Thank you for your answering my question, Mr. EmpyrealInvective.

I am considering to publish as a paid book.

How about your stories? Your contents is under CC-BY-NC?

Your creepypastas are interesting and awesome,

so I want to introduce them to Japanese people.

I would prefer that you didn't include any of my CC-BY-NC stories as those are the ones that I am publishing/have published. I've got a few stories/novels self-published/published/submitted to magazines and a number of publishing companies inquire about whether or not a work appears elsewhere (and sometimes that can be a deal breaker).

As for using my CC-BY-SA, I'd like to know more about your collection before I really go too far in weighing in on it as unfortunately there are a number of times that content has been grabbed online as a means of capitalizing on other author's work (See Emmering's collections). I don't want to infer that you're doing the same as you're translating them, but I would be interested to learn a bit more about your process of translating.

OK, thanks. I don't want to infringe one's copyright.

I think I need to be careful to in publishing a paid book.

People in Japan also like scary, strange stories  such as those in this wiki including yours.

I simply intoroduce your interesting creepypastas to Japanese.

Would you mind if I translate your articles (only CC-BY-SA) and put them on the "free" blog?

I will try not to change the original story as mush as possible, and place your name, original URL.

Thank you very much for your assistance.

I definitely understand that. I actually enjoy my stories being translated and would greatly appreciate if you bothered to translate a few of my stories on a blog. In fact, if it's free (no charge to view/read), I wouldn't mind if you translated a few of my Non-Commercial stories onto a Japanese site. My big concern comes from stories that I intend to post/publish (CC-BY-NC) in the future being published as it tends to cause a bit of a conflict and result in drama when I go to submit them.

Thank you very much for everything!

I will do my best with translating in order to make Japanese people fun with your wonderful stories.

No problem, if you wouldn't mind, link me to the translations so I can check them out. I know I can't read them fluently, but I still like to try and see how they translate out and what people's response to them are.