Sci-fi horror books start with a simple question: what if science goes too far? Here you'll find 17 free classics, from Mary Shelley's Frankenstein to H. G. Wells's Martian invasion.
This is where the genre was born, long before Alien or The Thing. Robert Louis Stevenson turned a chemistry experiment into a monster, and H. P. Lovecraft found alien ruins under the Antarctic ice.
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Mad Science
Mad Scientist Horror Books
Some of the scariest sci-fi horror books begin in a laboratory, with experiments that go terribly wrong. Frankenstein, Dr. Moreau and Herbert West gave us body horror long before it had a name.
A young scientist builds a living man from corpses and then abandons him, with terrible consequences for both. Mary Shelley's novel is the starting point of sci-fi horror, here in a clean, carefully typeset edition.
A respected doctor drinks his own chemical formula and unleashes a second self with no conscience. Stevenson's short novel turns a lab experiment into one of the most famous monsters in fiction.
A shipwrecked man lands on an island where a banished surgeon carves animals into half-human creatures. Wells's novel is a classic of body horror and a hard look at science without limits.
A bandaged stranger arrives at a village inn, hiding the secret of a formula that made him invisible and slowly unhinged. Wells shows how a brilliant discovery can turn a man into a menace.
A medical student obsessed with defeating death injects fresh corpses with his serum, and every success is worse than the last. Lovecraft's six-part story is the ancestor of every zombie lab tale.
A scientist builds a machine that lets humans see the creatures that share our world unseen. A short, tense Lovecraft story about what happens when you expand the senses too far.
A doctor operates on a young woman's brain so she can see the world beyond ours, and what she sees leaves a trail of madness and death. Machen's novella is a landmark of weird and scientific horror.
A mesmerist hypnotizes a dying man at the moment of death to see what happens next. Poe's clinical, step-by-step report builds to one of the most shocking endings in horror.
A student in Padua falls for the daughter of a scientist who raised her among poisonous plants until her touch became deadly. Hawthorne's tale asks what a scientist is willing to sacrifice for an experiment.
Here the horror comes from another world, like Martian invaders, ancient beings under the Antarctic ice or a strange color from space. Philip K. Dick's 1950s tales add a touch of space horror and paranoia.
Cylinders fall from the sky and Martian war machines march across the English countryside, burning everything in their path. Wells's 1898 novel invented the alien invasion story and still grips from the first page.
A scientific expedition to Antarctica uncovers a vast city built by beings that ruled the Earth long before humans. Lovecraft's most ambitious novella blends polar adventure with alien horror.
A meteorite lands on a remote farm and leaves behind a color no human eye has seen, one that slowly poisons the land and the family living on it. Lovecraft's favorite of his own stories.
A professor trades letters with a farmer who claims winged beings from another planet are hiding in the hills of Vermont. A slow-burn story of alien contact told through letters, recordings and growing dread.
A professor loses five years of his life, and his dreams suggest an alien mind lived in his body while his own was sent millions of years into the past. Lovecraft at his most science fictional.
A recluse in a remote house fights off pig-like creatures from a pit, then drifts across time to watch the death of the solar system. Hodgson's strange novel opened the door to cosmic and alien horror.
A man drives into town and finds a body hanging from a lamppost in the square, and nobody else seems to notice. Philip K. Dick's paranoid tale of alien takeover is pure 1950s sci-fi horror.
A spaceship crew buys a large, harmless-looking alien on Mars and plans to eat it, but the creature can read minds and has its own plans. Philip K. Dick's first published story ends with a chilling twist.
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