alien-infiltration
The presence of a non-human entity that kills military personnel and leaves behind alien script suggests an extraterrestrial or demonic infiltration.
5 chapters across 4 books
A Plague of Demons (2003)Keith Laumer
In this chapter, the protagonist confronts General Julius with alarming news about a missing Bolo combat unit and a commandeered military vehicle linked to a non-human entity responsible for killing its crew. Julius reacts with suspicion and hostility, ultimately pursuing the protagonist, who narrowly escapes with evidence of the alien presence. The chapter ends with the protagonist discovering that the authorities have quickly fabricated a cover story about the incident, indicating a deeper conspiracy.
The narrator, a damaged and immobilized machine with a living brain, observes alien demons repairing his fallen comrade and begins to infiltrate their stronghold by controlling a small maintenance unit with a cat brain. Using this disguise, he explores the alien tower, studies their operations, and initiates a deceptive conflict among similar units to distract guards as he seeks the source of the demons' power. Despite physical limitations and vulnerability, he pushes onward driven by instinct and strategic intent.
The Children of the Sky (2011)Vernor Vinge
Colonel Rachner Thract, disgraced and sidelined, struggles with his fading influence and the creeping realization of a vast, hidden alien threat manipulating events against the Accord and the Kindred. He receives a clandestine call from astronomer Obret Nethering, who reports a massive spaceship invisible to official detection, confirming Thract's suspicions of a deeper conspiracy. As communication networks become compromised, Thract resolves to seek direct contact with key figures to counter the unfolding crisis, highlighting the erosion of trust and control within the Accord's intelligence and military structures.
The Mote in God's Eye (1974)Larry Niven and Jerry Pournelle
The chapter depicts a tense evacuation and escalating conflict aboard the spaceship MacArthur as humans and Moties face a sudden crisis involving hostile miniature creatures infiltrating pressure suits. Orders from Admiral Kutuzov to abandon the ship and avoid contact with the Moties escalate the situation, culminating in a desperate struggle against the invasive miniatures that threaten the crew's survival. The narrative highlights the breakdown of trust and the chaos of emergency evacuation under unknown and dangerous conditions.
The Number of the Beast (1980)Robert A. Heinlein
In this chapter, the characters prepare for a swim while debating the cultural attire of Barsoomian warriors, highlighting differences in clothing and customs. The peaceful moment is interrupted by the arrival of a suspicious figure in a Federal Ranger uniform who is revealed to be an alien with bluish-green blood, leading to a swift defensive attack. The group then discusses the presence and threat of alien 'Black Hats' and their advanced continua craft, emphasizing the urgency to escape and the unique abilities of Deety, such as her innate time sense.