George Coriaty sees himself in the protagonist of his book. “He would be my alter ego,” the 69-year-old Roseburg resident said. “I think, in truth, a lot of successful authors put themselves into their main character.” At the beginning of this year, Coriaty self-published a novel, “Doppelgänger: A Deadly Mirror Image,” fulfilling a teenage dream to be a writer. The novel, an action thriller focused on the U.S. fight against terrorism, draws from his experience in the Army and National Guard. The protagonist, Col. Tony Collins, a military intelligence officer, has some similarities to Coriaty. While in the National Guard …