Why Isn't The Permaculture Designer's Manual An Ebook?

Anyone know if Mollison has said why the Permaculture Designer's Manual isn't in ebook format yet? Is it even still in print? I tend to see mostly used copies around on Amazon.

That book blows me away each time I crack it open, and it's a shame that it's so inaccessible. I travel a lot and it would be helpful to have an ebook version for laptops/tablets/phones, etc, so you can double check things.

I'm guessing it has to do with the pirating of the book, but I imagine overall profit would go up selling an ebook that was sometimes pirates rather than no ebook at all.

I suspect it has more to do with the fact that Mollison is really OLD.

I think it may be a bit of both the fact that he is older and that the book is pirated a lot. Concerns in the permaculture community have been voiced about third ethic's impact on publishing, but from what I can tell with how many books and videos are still coming out from permaculture people, its effect may be minimal. Also, it may just be that he doesn't want the book to be an eBook. Not all elderly people are anti-technology, just like not all young people are tech-savvy.