For beginners, 'Starship Troopers' by Robert A. Heinlein could be good. It's about a future war against bugs from outer space. It's not too complex and has a lot of adventure. Also, 'Fahrenheit 451' by Ray Bradbury, while it can be considered a bit of a blend of science fiction and dystopian, is easy to read. It's about a world where books are burned and one man's journey to question that system.
A good beginner - friendly science fiction book is 'A Wrinkle in Time' by Madeleine L'Engle. It has elements of time travel and strange new worlds, but it's written in a way that's accessible to new readers. 'The Hitchhiker's Guide to the Galaxy' by Douglas Adams is also a fun start. It's full of humor and crazy ideas, like the planet - building Magratheans and the super - intelligent mice.
Sure. 'The Martian' by Andy Weir is a great choice for beginners. It has a simple yet exciting plot about an astronaut stranded on Mars and trying to survive. The science is explained in an easy - to - understand way. Another one is 'Ender's Game' by Orson Scott Card. It follows a young boy in a military - like training for a future war against aliens. It's easy to get into and has a lot of action.