Celebrate Merch Madness at the Guitar World Online Store: Save 25 Percent! Posted 03/27/2014 by Guitar World Staff Continue Reading We're celebrating MERCH MADNESS at the Guitar World Online Store! Take 25 percent off any single item when you use code MADNESS14 at checkout. Once again, that's code MADNESS14. Head to the Guitar World Online Store now! Up Next Next Article Former Yes Man Trevor Rabin Talks Favorite Guitars, Film Scores and "Owner of a Lonely Heart"