Like a few here, I'd gladly pay $120 or more for a two volume hard cover version. Do consider doing a kickstarter or other form of crowdfunding. I've been reading the book and it's a real trip down memory lane :)
And in term of taxes, as someone living in Japan on a temporary visa in Japan, you do not pay taxes in Japan on income from abroad that does not get sent to Japan. I'm not sure about the Brazilian side of things but you might qualify as non-resident and in that case not be on the hook there. Of course, consult with a professional or read the double taxation agreements (which is a dry reading) but it's likely to not be too complicated in your case.
And in term of taxes, as someone living in Japan on a temporary visa in Japan, you do not pay taxes in Japan on income from abroad that does not get sent to Japan. I'm not sure about the Brazilian side of things but you might qualify as non-resident and in that case not be on the hook there. Of course, consult with a professional or read the double taxation agreements (which is a dry reading) but it's likely to not be too complicated in your case.