Thread:Deveros/@comment-4311242-20130801170611/@comment-4311242-20130801175847

If you've seen the content pages of volume 1, 2 and 3 on that website, you probably remember how each volume has a list of chapters that were numerically marked (e.g: 3, 4, 5, 6 and so on) and then one that wasn't, which was the extra chapter (in the case of volume 3, there were two unmarked).

It's the same thing with volume 4, so I'm guessing it has an extra chapter as well.