I hope this not seen as irrelevant but just a heads up for those who have not read the story or want a digital DRM Free copy.

The story is available in the The Humble Sci-Fi eBook Bundle as part of the Beat The Average tier.

More details of the bundle in the corresponding thread.

You don't even need to buy this as full story is available for download as a preview. ;)

Why would anyone that owns the game on GOG would need to buy a bundle with the story, when it comes packed with the GOG version as extra content, for free?