Library

I picked up a strange book, which describes many technologies that are far superior to those on the earth today. It is mixed with many short stories about different worlds, different technologies, and different societies. This is a story about a civilization in a different world that relies on a sacred tree for survival. This different world has two suns and no night. Because of the emergence of an unknown "door", it has contact with the earth. I guess this is a book from another parallel universe, because it contains a timeline similar to but different from that of Earth. The historical process in the book has far surpassed ours. Is this a different history from our world? Or is it a prank by some boring person? In order to find the answer, I sought arguments, organized the book and made it public, and asked netizens for help. I am a book picker - light cat.