Another characteristic could be the exploration of different time - related concepts. Some books might play with time travel, or show how time can be perceived differently in different settings or for different species. This can add a layer of mystery and complexity to the story, making the readers question our own understanding of time and its role in the universe.
Some of the books from 1992 might have been characterized by exploring emerging technologies of the time in a fictional context. For example, they could have delved into early concepts of virtual reality like in 'Snow Crash'.
Some might have strong dystopian themes. For example, they could depict a future where society has crumbled due to over - population or environmental disasters.
Some books in the list, like 'The Windup Girl', often deal with environmental and genetic engineering themes. It shows a world where humanity has tinkered too much with nature and now has to face the consequences.
Some books from the list, like 'The Snow Queen', often had strong female characters which was a bit different from some earlier science fiction. It was set in a far - flung future with different cultures.
A number of these books could feature alien species. The interactions between humans and aliens can range from friendly cooperation to all - out war. This allows the authors to explore different cultures and ways of thinking. Some might also use alien biology as a way to introduce unique scientific concepts. For example, an alien species with a different form of communication or a unique way of reproducing.
Well, for 'Ready Player One', its use of pop - culture references is a big characteristic. It appeals to a wide range of readers who grew up in the 80s or are fans of that era's culture. Also, it has a relatable hero on a quest, which is a classic storytelling element but set in a very unique, high - tech future setting.
Some books in the list of 1972 science fiction books had a strong focus on social commentary. For example, they might have explored themes like overpopulation, environmental degradation, or the abuse of power in a future society. They often used fictional settings to highlight real - world problems.
The books in this list may also show the anxieties of the era. With the Cold War going on, there could be themes related to the fear of nuclear war or the power struggles between different superpowers. At the same time, they might be exploring new ideas in biology and medicine as science was advancing in those fields at that time. For instance, some books could be speculating about genetic engineering or new ways of treating diseases in a science - fiction context.
Hard science fiction books from 2015 often had a strong focus on scientific accuracy. For example, they might accurately depict space travel, like in 'The Martian' where the details of living on Mars and the challenges of getting back to Earth were based on real science.
Many of them likely have advanced military technology as a key feature. For example, spaceships with high - tech weaponry or genetically enhanced soldiers.