The problem here is that the press reports are just rehashes of what the cops are putting out. Somebody should find this guy and interview him. He may be in hiding for reasons of his own.
His book is self-published on Amazon. It's been out since 2011, and you can read a sample there. This guy is not the next Steven King. A typical sentence: "As Zea approaches her partner she cannot restrain herself from hyperventilating as she peers at the black embossed letters on the translucent glass sign above the entrance to the central atrium".
Today, the Los Angeles Times quotes cops as saying "Everybody knew about the book in 2012", and that this is more about a four-page letter he recently sent to officials in Dorchester County, containing "complaints of alleged harassment and an alleged possible crime". There may be more clarity over the next few days, now that the story is getting attention.