In May 1997, soon after forming Platinum Studios, Rosenberg licensed "Cowboys & Aliens" to DreamWorks/Universal Studios based on film and comic treatments, storylines, artwork and an iconic one sheet of a cowboy on horseback shooting at an oncoming spaceship. The one sheet went on to become the graphic novel cover, and the graphic novel has appeared on the New York Times Bestseller List fourteen times for both hardcover and softcover. Platinum Studios Comics published the "Cowboys & Aliens" graphic novel in various formats between mid-2006 through 2012: