Unfortunately, my website got hacked and I am starting from scratch. I will get the form for PDF version back up as soon as I can, as well as all the information on contributors, bonus downloads and so on.
In the meantime, you can purchase the kindle version from amazon.com for only US$2.99, amazon.com.au for only AU$3.99 or the paperback version from a variety of outlets – I use bookfinder.com to find the best price for books (with shipping, in your own currency), but they are not absolutely comprehensive, so if you have a favourite online bookseller, make sure you check there first.
Also I have enrolled the kindle book in the kindle select program so that if you have a kindle unlimited account you can borrow it for free. Otherwise, if you are desperate for the PDF version contact me at SustainableSuburbia.net here, and I will let you know when I have it up and running again!