Maybe this excerpt would help some:
"Keller, alongside the artist Nik Kosmas form a collective called AIDS-3D which explores techno-utopianism along with other popular notions of progress. Recent projects have included the series Ideal Work (Creative Solutions) (2010–2011), multi-coloured solar panels styled after Mondrian canvases and OMG Obelisk (2007)."
Since never has it been seen an illustrator not crediting himself for his work so my assume is that the cover was made by "Avon"! yes the same company who published the book(Vortex). as there is no mention of the illustrator of the book-cover.
from the Narration of the fiction, a good consideration is that he the Artist, named the book after his name. David Heller. That why he never wrote it inside the book.
More on flickr https://www.flickr.com/photos/boydehaas/5225568089/in/photostream/ Already down the rabbit hole https://en.wikipedia.org/wiki/Avon_(publisher) This will help you find the artist
It looks like it is work of Gervasio Gallardo, it reminds me of his works. I can not find some book currently as reference but it relly does look like his work.