What are the most famous books about alien species fiction?

One common motive is conquest. They want to take over planets, including Earth, for resources or to expand their territory.

The Martians from H.G. Wells' 'The War of the Worlds' are an old - fashioned but still interesting ancient alien species. Their use of tripods and heat - rays to attack Earth was a very imaginative concept for the time. They were a terrifying and powerful force, showing how vulnerable humanity can be to an alien invasion.

Well, 'War of the Worlds' is super famous. It was one of the first to really explore the idea of an alien invasion in a detailed way. People were really scared when it was first published as it seemed so realistic. 'Independence Day' is also well - known. The movie adaptation made it even more popular. And 'The Day of the Triffids' has a cult following. It's not just about the invasion but also about how humans cope with a world turned upside down by these strange plants that seem to be alien in nature.

One of the best alien species in fiction is the Vulcans from 'Star Trek'. They are known for their logical thinking and unique culture. Their pointed ears and green blood make them distinct. Another great one is the Na'vi from 'Avatar'. They have a deep connection with their planet Pandora and their blue - skinned, large - eyed appearance is very striking. Also, the Daleks from 'Doctor Who' are quite memorable. They are robotic - like aliens with a strong desire for conquest and a distinct 'Exterminate!' catchphrase.

One interesting book about alien species fiction is 'Hyperion' by Dan Simmons. It has a complex universe with various alien races. It weaves together different stories and characters in a really engaging way. Also, 'Contact' by Carl Sagan is worth reading. It explores the idea of making contact with an alien species.

One of the best ancient alien species in fiction is the Goa'uld from 'Stargate SG - 1'. They were powerful and had a complex hierarchical society. They could possess human hosts, which added a lot of intrigue to the story.

One famous one is 'Contact' by Carl Sagan. It's about a scientist who makes contact with an alien intelligence. It combines scientific concepts with a great story.

The Xenomorph was the fictional alien species featured in the movie Alien. It's that creepy, acid-blooded creature.

The Wookies from 'Star Wars' are really cool. They are big, furry and very strong. Chewbacca is a well - known Wookie and he is a loyal friend and great co - pilot. The Transformers, which can be considered as a kind of alien species, are amazing. They can transform from robots to vehicles and have their own complex society and war. The Silurians from 'Doctor Who' are an ancient reptilian alien species that has a very different view of the world compared to humans.

One of the most popular is 'Ender's Game'. It has been widely read and loved for its engaging story of a child prodigy in a battle against aliens. Another popular one is 'The War of the Worlds'. It was one of the first major alien invasion stories and has had a huge influence on the genre. 'The Hitchhiker's Guide to the Galaxy' is also extremely popular for its comical take on the idea of aliens and the universe.