Brendan Keogh's critical analysis of Spec Ops: The Line has demonstrated a market for long-form games criticism.
The book has sold over 900 digital copies so far, with it's pricing model of asking $2.99, and an option to pay more.
According to publisher Stolen Projects, the average purchase price is $4.50, with some purchases being as high as $10.
Keogh said: "The reception of Killing is Harmless has been successful in sparking discussions about how games criticism can function to build a richer videogame culture."
"Truly, I never expected this many people would be willing to read such an extended piece about a single game. It just goes to show how hungry videogame audiences are for thoughtful writing unconstrained by traditional media delivery."