I have no doubt that the short story is the hardest to write. With limited space, the point, and there can really be only one, must be relatively obvious, yet complex enough to make an interesting story. Adding in a science fiction theme increases the level of difficulty, as generally, such stories require more explanation of the circumstances. Given that an environment different from the usual is necessary, some space must be used to explain the background of the story.
Despite all these hurdles, it is possible to write quality stories and this collection is an existence proof of how well it can be done. Independent of the length, these are some of the best science fiction stories of all time. They range from puns to the possibilities of interstellar war. I started the book and kept it close so that I could read it during every spare moment. It is one of the best collections of science fiction stories that I have ever read.