This book is a good illustration of how it's very difficult to write a satisfying short story in only three to four thousand words. There are two or three very good stories in here, but most of the others are really excerpts of what is obviously a larger story and don't really come to a gratifying conclusion.
I know this because I'm guilty of doing it myself. I once wrote a short story that didn't really properly conclude. The publisher pointed this out and rejected the story. I ended up turning that story into three novels: Skull Crusher, Rise of the Skull Crusher, and Fall of the Skull Crusher.