Manga is a Japanese-style comic. Unlike American comics, manga is in a book-format (except that it is read back to front and right to left because that is how it is read in Japan). I love reading manga, and have a huge personal collection, but have found that most of it is unsuitable for classroom use so... I only stock my library with manga rated E or G. This usually means that I have a lot of Naruto, Zelda, and other tv-ized books - but the kids LOVE it. I figure, if it works ~ stick with it! lol
Here's a few links to some manga series my kids have been going nuts over:
http://www.amazon.com/Warriors-Retur...6773798&sr=1-2
http://www.amazon.com/Naruto-Vol-2-M...6773836&sr=1-1
http://www.amazon.com/Big-Adventures...6773863&sr=1-1
Manga art style is pretty popular now, too. My avatar is from a manga series called Yotsuba ~ the over-exaggerated facial expressions are very common.