Jack Vance once was kind enough to offer me some good advice: "Let the reader get to know your characters before you get into the action." That advice is ignored here to the stories' detriment.
A second weakness of the writing is the author's tendency to tell rather than show what happens. There is a lot of 'splainin' going on in the first few pages. We learn all about nukes and asteroids and stuff, but what we don't do is see the characters being themselves.
But if this appeals to you, then, enjoy.