Far out. The author notes that there is a book for sale on Amazon seen on the show as a manuscript being read by Hurley, and cites the author bio from the online bookseller’s listing:
“About the Author: Bad Twin is the highly-anticipated new novel by acclaimed mystery writer Gary Troup. Bad Twin was delivered to Hyperion just days before Troup boarded Oceanic Flight 815, which was lost in flight from Sydney, Australia to Los Angeles in September 2004. He remains missing and is presumed dead.”
Lostpedia, a wikipedia for the show.