Is Stephen Kings book Gunslinger the same book as Gunslinger Born?

His series the Dark Tower on his website has the title of Gungslinger Born.
http://www.stephenking.com/DarkTower/the_graphic_novels.html
But when I was at the Barnes and Noble today the woman helping me said the first book in the series is called The Gunslinger.
Is the two titles the same book? [...]