An
extremely loose, glossy adaptation of the relatively
obscure 2006 independent studio graphic novel of the same name by Scott Mitchell Rosenberg, Cowboys & Aliens isn't the first mash - up of Westerns and science fiction (Westworld, Wild Wild West and Back to the Future
Part III are other examples), but it is one of the first in a popular burgeoning trend in mixing genres that has seen books like «Pride and Prejudice & Zombies» become popular.