Which are considered the best ever science fiction books?

Definitely 'The Andromeda Strain' by Michael Crichton. It has an alien - like microbe from outer space that causes a major crisis on Earth. It's a page - turner. 'Rendezvous with Rama' by Arthur C. Clarke is another great one. The discovery of the huge alien spacecraft Rama is fascinating. 'The Left Hand of Darkness' by Ursula K. Le Guin has a unique alien race, the Gethenians, whose gender - less nature challenges human concepts.

Definitely 'Foundation' by Isaac Asimov. It's a series that presents a grand vision of a galactic empire in decline and the attempts to preserve knowledge and civilization. Asimov's ideas about psychohistory are fascinating. Also, 'The Invisible Man' by H.G. Wells is a classic. It's about a scientist who becomes invisible and the chaos that ensues, exploring themes of isolation and the misuse of scientific discovery.

In 2019, 'The City in the Middle of the Night' was quite good. It's set on a tidally - locked planet and explores themes of power, society, and survival. The world - building is really well - done, creating a vivid and unique setting for the story to unfold.

One of the best is 'Hyperion' by Dan Simmons. It has a complex structure and a richly imagined universe. The different stories of the pilgrims on their way to the Time Tombs are really engaging. 'I, Robot' by Isaac Asimov is also a classic. It introduced the Three Laws of Robotics, which have been a staple in science - fiction discussions about artificial intelligence. And 'Fahrenheit 451' by Ray Bradbury, while often seen as a dystopian novel, has strong science - fiction elements in its vision of a future society that burns books.

I think 'The Time Machine' by H.G. Wells is quite good. It shows different future societies, one of which could be considered a utopia in some ways, with the Eloi living in a seemingly idyllic but ultimately flawed world. Another is 'The Left Hand of Darkness' by Ursula K. Le Guin. It explores genderless society concepts which are related to creating a more inclusive and perhaps utopian social structure. 'Solaris' by Stanislaw Lem also has elements that make you think about utopian ideals in relation to an alien planet and the human attempts to understand it.

It's subjective, but many consider 'Dune' by Frank Herbert as one of the greatest. Its rich world-building and complex characters make it a standout.

It's hard to pinpoint one single best science fiction book as it depends on personal preferences. But many consider 'Dune' by Frank Herbert to be a top contender due to its rich world-building and complex characters.

In my opinion, 'Ender's Game' by Orson Scott Card is one of the best in science fiction books. It delves deep into the mind of a child prodigy, Ender Wiggin, who is trained to fight in a future war against an alien race. The book explores themes of morality, leadership, and the cost of war. Also, 'Brave New World' by Aldous Huxley is a classic. It presents a future society where people are genetically engineered and conditioned to fit into a specific caste system, making us question the price of a so - called 'perfect' society.

I think 'Star Wars: Expanded Universe' books (now known as 'Star Wars Legends') are great. They expand the already vast Star Wars universe with many different storylines, characters, and planets. It gives fans a deeper look into the lore behind the movies.

One of the best science fiction books ever is 'Dune' by Frank Herbert. It has a richly detailed universe, complex characters, and themes that range from environmentalism to politics. Another great one is '1984' by George Orwell, which, while often considered a dystopian novel, also has strong elements of science fiction in its portrayal of a totalitarian future. And 'Brave New World' by Aldous Huxley is also a classic. It presents a future society where people are genetically engineered and conditioned, making us think about the implications of technology on humanity.