supermarket books section is very helpful for familiarizing myself with the latest and greatest in Dean Koontz and Harlequin romances. Not that there is anything wrong with Dean Koontz
So, where do I go for the popular graphics novels for the adult audience? Does that even exist in America nowadays?
Barnes & Nobles or other large bookstore, in the manga section. These will of course, be the manga that are translated and selling the US. Not the bestsellers in Japan.