Just a little side note, something I saw pointed out recently that seems to apply here. When sending a message to non-English speaking authors, try to avoid English idioms as much as possible. There are a bunch of cases where artists think a comment is negative, or even upset at them, when it's actually a compliment like "Your stuff is so good, I hate it!" Better to keep it as straightforward as possible.
Also, if you do that, try not to make it too obvious you're reading the doujin books in English, since it's technically piracy. Japanese artists get really ticked off about that.