Even though it's not a real manga like we're used to reading/translating/cleaning... here this is a Essay-manga that contains little stories about people learning Japanese and asking questions about different "weird" aspects of the Japanese language or history/habits so i'm sure a lot of you guys would find it interesting to read if you're interested in Japan(ese).
I haven't found it in English yet since it isn't action filled or anything but it's a really good book for those of you that can read Japanese.