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No,
I think Bleach is the #1 manga.
you can read it on the internet under 'Ranma Manga'
Volume usually refers to a novel (book style) of a series, while manga obviously refers to the manga (comic style).
You can read it at mangafox.com (so far they only have vol 1)
Manga Mad - 2008 was released on:
USA: 1 July 2008