Plague has stricken Earth, ending civilization as we know it, but the majority of humanity lives on, playing out their lives as immortal denizens in a computer program known as Soteria. All has been going as planned for 150 years, but humans are humans and discontent turns to greed. When a mysterious group of hackers begins stealing memory resources, entire realms begin to disappear and it is left to a handful of individuals spread across three worlds to salvage what's left of human existence.
Used availability for Garrett Calcaterra's Page Fault
January 2015 : USA, Canada, UK Kindle edition