Re: Flowers for Algernon by Daniel Keyes
If you find Flowers for Algernon touching, I recommend Robert Silverberg's "Dying Inside". It has been overlooked by mainstream literature because it is "SciFi" but it's a masterpiece that stands in its own right irrespective of any "genre" tags. Its main themes are human sorrow, wasted youth, wasted talent and the recognition of mortality.
It is better, in my opinion that Woolf's "Orlando" - why isn't that regarded as SciFi? It's also better than Rushdie's "Midnight's Children" (ditto).