Well, '2001: A Space Odyssey' by Arthur C. Clarke was very popular. It's about a mysterious monolith and the journey of discovery it sets in motion, both in space and in terms of human evolution.
Ray Bradbury's 'Something Wicked This Way Comes' is from the 1960s. It's a darker take on science fiction, with elements of the supernatural and the power of fear. It's set in a small town and shows how the arrival of a strange carnival can disrupt the lives of the townspeople in a very otherworldly way.
I'm not sure which ones are the most popular exactly, but 'Snow Crash' by Neal Stephenson is often highly regarded. It's set in a future where the world has been transformed by a new form of technology and virtual reality, and it has a really unique and engaging plot.
Another popular one might be 'The Uplift War' by David Brin. It's part of a series and in 1989 it was attracting a lot of attention for its unique take on the evolution of intelligent species and the politics between them.
I'm not entirely sure which ones were the most popular, but 'Doomsday Book' was widely talked about. It had an interesting premise of time - traveling historians.
Another popular one could be 'The Uplift War'. It was part of a well - known series and had a lot of fans who were into the idea of the uplift concept, where lower species are 'uplifted' to sentience by higher ones. It had exciting battles and interesting alien species interactions.
'Gateway' is also very popular. Its exploration of human nature in the face of the unknown, along with the unique setting of the alien space station, has attracted a large number of readers. People are drawn to the mystery of the ships and the potential for discovery, as well as the well - developed characters.
Well, 'Ender's Game' by Orson Scott Card is likely to be in the stack. It tells the story of a young boy trained for interstellar warfare. 'Foundation' by Isaac Asimov is another classic. It's set in a vast galactic empire and explores concepts like psychohistory. And 'Brave New World' by Aldous Huxley, which depicts a future society with strict caste systems and technological control over human behavior.
'Wool' by Hugh Howey was quite popular too. It's set in a post - apocalyptic silo, and the mystery and the characters' struggles within that confined space were really engaging for readers. The story gradually unfolds, revealing more about the world outside the silo as it progresses, which kept readers hooked.
Praxis Books science fiction has a good following. They tend to blend different sub - genres of science fiction like space opera and cyberpunk in interesting ways. Their books also usually have well - developed characters that readers can really connect with.
Science fiction books are extremely popular. Many people are fascinated by the imaginative worlds and advanced concepts they offer.
One reason is that science fiction often makes us think about the future. It can raise important questions about how society might develop, like in 'Blade Runner' - based novels which explore the implications of artificial intelligence and genetic engineering. Also, the action and adventure in many science fiction books are really appealing. Think of the epic battles in 'The Lord of the Rings' - esque science fiction tales.
Not as much as some mainstream science fiction sub - genres. Mainstream science fiction often focuses on space exploration, time travel, etc. However, girdle science fiction books, which might deal with more specific or unusual concepts related to 'girdle' (whatever that may imply in the context of the books), may have a dedicated but smaller following. They might be more popular among those who are looking for something different and less explored in the science fiction realm.