Delacroix, try this one:
Amazon.com: The Kodansha Kanji Learner's Dictionary: Jack Halpern: Books
I own that and the more academic version as well. The one I've linked you to is less than $30. I think that's about what a couple of doujin cost, no? The dictionary is far more valuable than another two manga where Tuxedo Mask and Ash from Pokemon make love.
And mangafreak, doujinshi is 同人誌. It's basically like "the aforementioned person's magazine" or "coterie's magazine."