An Internet multiplayer game turns deadly when a diabolical killer masquerading as a harmless player threatens the lives of the other players. Without his father's permission, 17-year-old Elliott Anderson enters Star Gate, an Internet multi-player game with elements of virtual reality. In order to promote the game, the company producing Star Gate has offered a $100,000 prize. Unknown to Elliott and the other players, one of the contestants, Henry Freeman, is a homicidal maniac in dire financial straits. When Henry is eliminated from any serious chance of winning the prize money by Elliott and his co-conspirators, he vows revenge and begins to track down those who have destroyed him. Chase Anderson, Elliott's father, is an attorney with his eye on a judgeship. He learns of his son's participation in the game only after a series of events that threaten Elliott's life. Exposing Henry's true identity to stop him from killing his son and the other Star Gate competitors becomes his crusade. Killer App is the kind of contemporary, sexy thriller that will keep you on the edge of your seat and test your e-reader's battery as you flip pages well into the night.