I got this one -->
http://www.akadot.com/pixiv-girls-colle ... 28191.htmlThere's only one Pixiv Girl's Collection...the other ones are called something differnt. Anyway, Pixiv is a site with a lot of community art (someone else here can probably tell you a lot more about the site). This is just an art book with a lot of better pictures presented on that site. Either way, it's an awesome art book and lots of variety, but I liked every picture in it.
I know there are a few others on zerotype who bought it...
EDIT:
http://www.pixiv.net/ is the site if you are curious.
EDIT2: Maybe one reason they decide to do the book "reversed" was because of a lot of the pictures coming from all over the world? I know I stumbled upon someone's deviant art page where he was talking about how his picture got in the book (and the picture is freely available online, its not exclusive to the book).