The World of M is a collection of concept art designed by Korean artist H2SO4. It's a doujinshi and was the release for the circle Island of Horizon during Comiket 76. The World of M is just a start, and it looks like H2SO4 may be working on it for future doujinshi releases.

The circle Ice & Choco, run by Naru Nanao and Kokonobi, has a similar thing going on with their Plumaos Academy, which consists of all original characters who they put in a variety of different art work. The World of M is 16 pages and full color, but that's a little misleading seeing as at least three of those pages are solely black and white sketches.

But... If this is the direction H2SO4's I'm not too thrilled with the prospects. His previous books like Shiroi Hane and Tropical Nights, Girl's Rhythm all included a lot of variety along with fan art. I really enjoyed his takes on other characters.

This isn't to say the World of M release is bad, much to the contrary, the art work and designs are well done. But all the pages (aside from the first page) are character modeling pages, and the rest are rough sketches. There is some background scenery in there, but that really is about it.

Ironically, the highlight of the release for me was the postcard given away with the book at Comiket 76 that was by another artist, Tiv. There were actually two different postcards available, but you were only able to pick one per copy of the book you bought. I would definitely recommend some of H2SO4's other releases over this one, but hopefully this concept world will evolve into something better later on.