Social Science Fiction set of two books

Set of 2 books and 4 novels by an outstanding modern science fiction writer:
"Culling" — a warning novel that has been stirring minds for twenty years and is more relevant today than ever. In this country, everyone is happy because... they know who the enemies of the people are and what to do with them.
"Night Watchman" — a tough book about real vampires and real people. Instead of a sword — an axe, instead of a prayer - a strong word. What, you bastards, drank our blood?
"The Best Crew of the Sunny" — a daring and cruel story of military astronauts who were heroes and then found themselves unnecessary, abandoned, betrayed and finally cursed. Don't treat people like that whose profession is space combat and whose calling is to protect and serve.
"Saboteur" — a decoy book, seemingly about idiocy and endless drunkenness on a planet where crocodiles fly in the sky and the elixir of immortality flows underfoot. And also about war and peace, life and death, faith and hope.