I just learned this week that there’s a blog tour aimed at encouraging people to read widely in SF/F: A more diverse universe. I wish I’d known of it sooner; I would definitely have participated. I’ve certainly read books by people of diverse ethnic backgrounds, and I’ve tried to talk about some of them here — Saladin Ahmed, Octavia Butler, Nnedi Okorafor, N. K. Jemisin, Aliette de Bodard, and Hiromi Goto come to mind. I’m also currently reading Arctic Rising by Tobias Buckell, as well as occasionally dipping into the Apex Book of World SF 2.
Go, check out some of the offerings, and read!