Daniel Suarez 
Daemon [EPUB ebook] 

A man is found brutally murdered — and the only possible perpetrator happens to be dead. As more killings follow, it becomes clear that mass carnage is being planned and organised from beyond the grave.The Daemon — a lethal and seemingly unstoppable computer program — is responsible and murder is the least of its capabilities. Masterminded by a twisted genius, the Daemon inhabits the systems on which society depends. In a world where everyone and everything is online, nothing is out of its reach. And as we are all connected, there is no escape…Explosive, action-packed, terrifyingly relevant, Daemon redefines the high-concept thriller for the information age.