DENVER—A man accused of killing five people in a rampage in Denver is believed to have written fictional books self-published online that named some of his real-life victims and described similar attacks. The writings are part of the investigation into what led Lyndon James McLeod to carry out the shootings, which took place in less than an hour Monday at several locations around the metro area, Denver police spokesman Doug Schepman said Wednesday. McLeod, 47, knew most of the people he shot through business or personal relationships, police have said. Four of those shot were attacked at tattoo shops. In addition to those killed, two other people were wounded, including a police officer who shot and killed McLeod after being hit. In the first novel, written under a pen name of Roman McClay, a character named Lyndon stalks a poker party held by a character named “Michael Swinyard” and gains …