No clue as to a black author. I read a lot of stuff off my kindle now so they could all be fucking bright green for all I know.
So as far as I'm concerned that's a non-issue.
As for 'foreign' writers...
I'm Irish so apart from the odd pretentious poet or 'pithy' ex-pat social commenter every English speaking writer is a foreigner to me, and write from a mildly alien perspective.
As for non-English speaking writers....
THe guy who wrote The Achemist and all that shite, The Witcher Series, The Night/Day watch series, Metro Series, I've read War and Peace, and Doctor Zhivago, as well as Crime and Punishment. I've read a lot of Voltaire and Dumas(I would consider him 'French' rather than 'black' in respect to his writing.), Nietche, Freud, Yung, And a little DeCartes.
I've read very little Asian stuff; Mushashi, Oyama, Lu Tse, Sun Tsu. the only modern novel of an Asian bent was Memoirs of a Geisha and I wish to fuck I hadn't bothered.