(Disclaimer: E. Lynn Harris did not write sci-fi but I acknowledge his passing in this forum nonetheless).
I stopped reading E. Lynn Harris several novels ago (I always stop reading an author when they start to repeat themselves), but I remain impressed by his command of his medium. Mr. Harris' books were fluid, enjoyable reads without being overly simplistic. I went to several of his book signings and I envied him the incredible looking black women that would patiently queue up for his signature. He was a master of his craft.