awareness,
Both the abridged and the unabridged versions of the ebooks are available on Amazon. Unfortunately, the abridged is the easier one to find when on their site.
This link should take you directly to Amazon's unabridged version:
https://www.amazon.com/dp/B00BD8ZB3O/Kindle.
The link I first provided going via the GWTW website shows a purple book in the upper right-hand column. Under it is a link, called "Kindle," that will also take you there.