This encompasses many of the categories listed above, but as it doesn't fit under any one, I'm going to give it its own comment; please feel free to remove it if it's cluttering up the post.

So Long Been Dreaming: Postcolonialist Science Fiction and Fantasy is an anthology compiled by Uppinder Mehan and community favorite Nalo Hopkinson. It was one of the first books I read for this challenge, familiarizing me with a lot of authors whose novels I went on to read, and I give it my wholehearted recommendation.