There are many repeated stories in Liu's collection of short stories. How to buy reasonably?

1, three-body upper, middle and lower, supernova age and ball lightning are three separate books, so I bought them separately (here is a ***5 book).

2. "Devil's Building Blocks+Cretaceous Past Events" is a book, and only this one contains the story of devil's building blocks, so this book 1 should be bought.

3, the rest are short stories, buy the cornerstone series of Sichuan Science and Technology Publishing House, "Take Her Eyes"+"Dream Sea", which contains almost all Liu's short stories (including ***35, covering the wandering earth, time migration, supporting mankind, 20 18, Taoism, rural teachers and other classics).

In this case, if you buy 8 books, you will basically buy all Liu's novels, and a story will not be repeated!