Reddit reviews Sword Art Online Progressive, Vol. 2 - manga (Sword Art Online Progressive Manga)

http://www.amazon.com/dp/0316259373
http://www.amazon.com/dp/0316383775
http://www.amazon.com/dp/0316348759
http://www.amazon.com/dp/031631465X

Here you go. There's the whole "(manga)" part in the name, so they are pretty obvious, though.

There's a couple things I would like to point out here, both of which can be found in our LN FAQ. One, none of the LNs have eBook formats while the manga do. It's odd that switching from paperback to eBook switches like that, but the eBook link has been incorrectly linked to the LN version for quite some time now. Two, the titles should be a dead giveaway. The eBook version clearly has "(manga)" in the title, while the paperback version does not. As I said already the eBook version is incorrectly linked to the LN paperback, but the title and art change so that should be a bit of a red flag.

While you're correct that it still says "Book 2 of 4 in the Sword Art Online: Progressive Manga Series", the description (which is right below that) is also altered drastically.

The final thing I would like to point out is that there is a cheaper version of the paperback manga. I have absolutely no idea why it's this way, but Amazon doesn't seem to have their version listed despite being in stock. You can find it here. Volume 1 of the manga seems to be in the same boat, so perhaps I'll edit the LN FAQ with direct links to them until Amazon gets it sorted out.

I meant that you link to where you could buy the manga

For exemple
Progressive 1
Progressive 2