User blog comment:OnePieceNation/Some Questions?/@comment-4436931-20181114230208

2. You can buy them at your local bookstore, or, if you don't live in a place that has them, try Amazon or some other online store. I'd recommend reading from the beginning since volume 9 hasn't been translated yet

3. The synopsis for the other arcs are split across the synopsis tabs of the volume pages (volume 1 here). Arcs 4-6 are still on Subaru's synopsis page because no one's written the light novel version for it yet

4. Which ones?

5. Arc pages are kind of redundant, you'd just be repeating the same information over again. At most there could be a mention about arcs on the series page

6. That's what the series page is for, though the community messages part could be updated to include some links. As far as I know you're the only one that's made such a blog. You could've also read the article on Wikipedia you know