Approximately 47 000 words.
You can now get the Unaustralians for free in just about any conceivable format. Go to smashwords:
Or you can grab it from the link below in a pack with epub, mobi and pdf formats. Smashwords does a pdf conversion too, but it's way too large to read comfortably on a smaller tablet or ipad. This pdf is your best option if you're using one of those devices without a software e-reader.