Space with aliens or viruses. Thriller and horror.

1.
Little Fuzzy (Fuzzy Sapiens, #1)
Little Fuzzy (Fuzzy Sapiens, #1) 4.03 avg rating — 10,605 ratings
2.
Al Clark (Al Clark, #1)
Al Clark (Al Clark, #1) 4.15 avg rating — 1,646 ratings
3.
Spaceship Medic
Spaceship Medic 3.85 avg rating — 211 ratings
4.
Deathworld 1 (Deathworld, #1)
Deathworld 1 (Deathworld, #1) 3.93 avg rating — 9,225 ratings
5.
David Starr, Space Ranger (Lucky Starr, #1)
David Starr, Space Ranger (Lucky Starr, #1) 3.72 avg rating — 3,696 ratings
6.
A Graveyard of Stars
A Graveyard of Stars 4.17 avg rating — 58 ratings
7.
Alien 3: The Unproduced Screenplay by William Gibson
Alien 3: The Unproduced Screenplay by William Gibson 3.51 avg rating — 1,487 ratings
8.
Alien: The Cold Forge
Alien: The Cold Forge 3.92 avg rating — 3,096 ratings
9.
Alien: Prototype
Alien: Prototype 3.68 avg rating — 1,314 ratings
10.
Alien: Into Charybdis
Alien: Into Charybdis 3.87 avg rating — 1,431 ratings
11.
Ambulance Ship (Sector General, #4)
Ambulance Ship (Sector General, #4) 4.08 avg rating — 605 ratings
12.
Hospital Station (Sector General, #1)
Hospital Station (Sector General, #1) really liked it 4.00 avg rating — 2,284 ratings
13.
Star Surgeon (Sector General, #2)
Star Surgeon (Sector General, #2) 3.94 avg rating — 847 ratings
14.
Mission of Gravity (Mesklin #1)
Mission of Gravity (Mesklin #1) 3.90 avg rating — 7,528 ratings
15.
The Prospect: A Sci-Fi Horror Novel
The Prospect: A Sci-Fi Horror Novel 4.17 avg rating — 12 ratings
16.
Alien: Enemy of My Enemy: An Original Novel Based on the Films from 20th Century Studios
Alien: Enemy of My Enemy: An Original Novel Based on the Films from 20th Century Studios 3.70 avg rating — 596 ratings
17.
Alien: River of Pain (Canonical Alien trilogy, #3)
Alien: River of Pain (Canonical Alien trilogy, #3) 3.84 avg rating — 4,115 ratings
18.
Eye of the Monster
Eye of the Monster 3.54 avg rating — 218 ratings
19.
The Fall of Metropolis Seven
The Fall of Metropolis Seven 4.21 avg rating — 19 ratings
20.
The Cargo
The Cargo 3.74 avg rating — 43 ratings
21.
Alien: Sea of Sorrows (Canonical Alien trilogy, #2)
Alien: Sea of Sorrows (Canonical Alien trilogy, #2) 3.79 avg rating — 4,049 ratings
22.
Screams from the Void
Screams from the Void 3.60 avg rating — 176 ratings
23.
Alien: Out of the Shadows (Canonical Alien Trilogy, #1)
Alien: Out of the Shadows (Canonical Alien Trilogy, #1) 3.81 avg rating — 10,561 ratings
24.
Fallen Metropolis: Omnibus Edition
Fallen Metropolis: Omnibus Edition really liked it 4.00 avg rating — 2 ratings
25.
Hellweg's Keep
Hellweg's Keep 3.07 avg rating — 70 ratings
26.
Slithers: A Dark Sci-Fi Short Story
Slithers: A Dark Sci-Fi Short Story 3.17 avg rating — 18 ratings
27.
The Last Marine
The Last Marine 4.22 avg rating — 41 ratings
28.
Aliens
Aliens 4.13 avg rating — 6,683 ratings
29.
The Snow Maiden
The Snow Maiden
by: J.J. Beer
really liked it 4.00 avg rating — 1 rating
30.
A Murmuration of Opas
A Murmuration of Opas 4.42 avg rating — 33 ratings
31.
The Voyage of the Space Beagle
The Voyage of the Space Beagle 3.84 avg rating — 3,968 ratings
32.
Cemetery World
Cemetery World 3.59 avg rating — 17 ratings
33.
Dead Station: Short stories
Dead Station: Short stories 3.69 avg rating — 147 ratings
34.
AMALGAM BOOK THREE: TRANSIT
AMALGAM BOOK THREE: TRANSIT
by: Mike Duke
4.44 avg rating — 41 ratings
35.
The Plasm
The Plasm 3.91 avg rating — 75 ratings
36.
Contact (Amalgam #1)
Contact (Amalgam #1)
by: Mike Duke
4.08 avg rating — 161 ratings
37.
Retrieval (Amalgam, #2)
Retrieval (Amalgam, #2)
by: Mike Duke
4.36 avg rating — 64 ratings
38.
Leech
Leech 4.22 avg rating — 27 ratings
39.
Metro 7
Metro 7 3.95 avg rating — 96 ratings
40.
Parasite
Parasite 3.83 avg rating — 4,020 ratings
41.
Colony of The Dead
Colony of The Dead 3.30 avg rating — 10 ratings
42.
Derelict: Marines (Derelict Saga #1)
Derelict: Marines (Derelict Saga #1) 3.77 avg rating — 750 ratings
43.
Juggernaut
Juggernaut 4.44 avg rating — 9 ratings
44.
Deathform
Deathform 3.61 avg rating — 110 ratings
45.
Station 3
Station 3 3.93 avg rating — 220 ratings
46.
Alien
Alien 4.09 avg rating — 22,045 ratings
47.
2389
2389 3.62 avg rating — 1,582 ratings
48.
Luna
Luna 3.68 avg rating — 145 ratings
49.
Deathform
Deathform 3.61 avg rating — 110 ratings
50.
Dead Moon (Threshold, #3)
Dead Moon (Threshold, #3) 3.48 avg rating — 4,754 ratings
51.
The Dark Ship
The Dark Ship 3.59 avg rating — 669 ratings
52.
Beneath (Origins, #3)
Beneath (Origins, #3) 3.91 avg rating — 1,665 ratings
53.
Contagion (Contagion, #1)
Contagion (Contagion, #1) 3.88 avg rating — 7,248 ratings
54.
Plague Station
Plague Station 3.60 avg rating — 5 ratings
55.
AUTONOMOUS
AUTONOMOUS really liked it 4.00 avg rating — 15 ratings
56.
The Unknown
The Unknown 4.08 avg rating — 13 ratings
57.
The Luminous Dead
The Luminous Dead 3.64 avg rating — 19,033 ratings
58.
Containment Room 7
Containment Room 7 3.90 avg rating — 48 ratings