One of the most popular is likely 'Starship Troopers'. It has a great mix of military action and alien encounters. It shows a future where humans are at war with a race of bugs from another planet.
I would recommend 'Invasion!'. It's a classic in the alien invasion graphic novel genre. It has intense action scenes where humans fight against the invading aliens. Then there's 'Alien Legion', which shows a unique take on an alien - occupied universe and the battles that ensue. Also, 'Planetary' has some really cool concepts regarding strange and otherworldly threats that can be considered as a form of alien invasion.
One of the best is 'Watchmen' by Alan Moore. It features a complex story with elements that can be seen as 'alien' in the sense of being outside the norm of society. The characters are unique and the art is top - notch.
Well, 'Alien: The Illustrated Story' is a great pick. It adapts the classic 'Alien' movie into a graphic novel format, with all the terrifying xenomorphs and the tense atmosphere. Then there's 'Saga' which has a diverse range of alien species. It tells a story of star - crossed lovers from different species in a vast and imaginative universe. 'Locke & Key' also has some elements that can be considered alien - like in its mysterious keys and the strange things they unlock in a world full of secrets.
Well, a major characteristic is the exploration of human responses. In 'alien invasion graphic novels', we can see how humans react differently - some may fight bravely, like the soldiers in 'War of the Worlds' - inspired graphic novels. Others may try to negotiate or flee. Also, the technology shown is quite distinct. The aliens usually bring advanced technology that is both fascinating and terrifying, such as energy weapons or the ability to travel through dimensions.
Probably 'Ender's Game'. It's widely read and loved. The technology in it, like the battle school simulations and the mind games, are really captivating. It shows how humans interact with and learn from alien technology.
I think 'Independence Day' is also very popular. The idea of a global coordinated effort to fight off the aliens is really exciting. And the huge alien ships hovering over major cities is a very memorable image from both the movie and the novel. Additionally, 'The Invasion of the Body Snatchers' has a certain popularity because of its creepy concept of the aliens taking over humans without them even realizing it at first.
The best ones often have a sense of mystery. Take 'Invasion!'. The origin and motives of the invading aliens are not clear at first, which keeps the readers hooked. They also tend to have great action sequences. 'Alien Legion' is full of intense battles between different species. And they usually explore deeper themes. 'Planetary' delves into themes like the nature of existence when faced with strange and otherworldly threats that are like an alien invasion.