User blog comment:B214/Question & Answers 5/@comment-154.71.6.64-20151220062203/@comment-79.181.175.115-20151220080534

A Volume is... When book has a lot of pages, then it need to be released in parts, right? So, that is a Volume in a nutshell, I think. Like, if you were to combine all 20 Volumes of High School DxD, you'd get something about at least 7000~9000 pages, and that's pretty much freaking god damn too much for a book, and that's with the 20 Volumes that released, there are to be about 10 more Volumes, and that'll be about 3500~5000 more pages, and that's really too much for a book. I mean, the one who's buying it would barely be able to carry it because it's heavy from way too much pages. So... I think that Volumes are something like that.