Yes. 'Stranger in a Strange Land' by Robert A. Heinlein is very popular. It follows the story of a human raised on Mars and his return to Earth. 'Ringworld' by Larry Niven is another great choice. It's about a huge artificial world in space. 'Flowers for Algernon' by Daniel Keyes also has sci - fi elements as it deals with intelligence enhancement and the consequences.
Sure. 'Starship Troopers' by Robert A. Heinlein is a great one. It's about a future military and the soldiers' experiences in an interstellar war. Another top book is 'The Time Machine' by H.G. Wells. It's a thought - provoking exploration of time travel and the possible future of humanity. And 'I, Robot' by Isaac Asimov, which has some really interesting ideas about robotics and artificial intelligence.
Definitely. 'A Canticle for Leibowitz' by Walter M. Miller Jr. is a must - read. It shows a post - apocalyptic world where the Catholic Church is preserving knowledge. 'Rendezvous with Rama' by Arthur C. Clarke is also excellent. It tells the story of an encounter with an alien spacecraft. 'The Left Hand of Darkness' by Ursula K. Le Guin is a top - notch sci - fi book that explores gender and society in a unique alien world.