multiple authors, same name, not sure how to handle

[Samantha]

So I'm working on combining/fixing series listings and come across Steve Berry (of the Cotton Malone series), on his combine books page are quite a few I'm guessing he didn't write i.e. coloring books and twilight fan fiction. I'm at a loss as to how to fix this, some do have an author 'Steve Berry' some do not and I'm not sure who'd I'd attach them to as there are multiple authors of that name.... help please.

[Abcdarian]

Working on ... Think I've weeded out everything that isn't the Cotton Malone author's.