If You Loved Frankenstein (1818), Read These 5 Sci-Fi Classics: The Time Machine (1895), The Island of Doctor Moreau (1896), The War of the Worlds (1898), The Invisible Man (1897), and When Worlds Collide (1933)
<div class="tldr-box"> <div class="tldr-title"><span>TL;DR — Quick Summary</span></div>Mary Shelley's Frankenstein (1818) defined the moral weight of science fiction, and these five novels expand that legacy. H.G. Wells's three foundational tales — The Time Machine (1895), The Island of Doctor Moreau (1896), The War of the Worlds (1898), and The Invisible Man (1897) — each explore the unintended consequences of human ambition. The lesser-known When Worlds Collide (1933) by Edwin Balmer and Philip Wylie pushes the genre toward planetary-scale disaster. All are public domain and free to own.
</div>Why Shelley's Monster Created an Entire Genre
Readers who finish Frankenstein often ask the same question: what else grips this hard, probes this deep, and refuses to let go? Shelley's novel wasn't just a horror story — it was the first major work to ask what happens when science outruns morality. Victor Frankenstein's creation is not a monster by nature, but by neglect and fear. That tension — between innovation and responsibility — became the spine of science fiction.
The books that followed in the 1890s and early 1900s took that same spine and bent it into new shapes. Time travel, vivisection, alien invasion, invisibility, and planetary collision. Each story is a thought experiment dressed in fiction: what would you do if you had the power? And what would happen to the world if someone else did?
1. The Time Machine (1895) — H.G. Wells
The Novel That Invented Time Travel
H.G. Wells didn't just write the first modern time travel story — he wrote one that still feels disturbingly relevant. The Time Traveller journeys to the year 802,701 AD and discovers two human species: the gentle, childlike Eloi and the subterranean, machine-tending Morlocks. What seems like a utopian future becomes a nightmarish class war made biology.
Like Frankenstein, The Time Machine is a warning. The Eloi and Morlocks are the end result of Victorian social divisions pushed to their logical extreme. Wells asks: if the rich isolate themselves from labour long enough, what do they become? The answer is weaker, smaller, and vulnerable. The Time Traveller's journey is not just through centuries, but through the consequences of ignoring human suffering.
- Publication year: 1895
- Author: H.G. Wells
- Central theme: Social collapse through unchecked class division
- Connection to Frankenstein: Both stories follow a brilliant man who creates something he cannot control
2. The Island of Doctor Moreau (1896) — H.G. Wells
Vivisection, Identity, and the Beast Within
Edward Prendick is shipwrecked on a remote island where a disgraced scientist, Dr. Moreau, performs horrible experiments: he surgically transforms animals into humanoid creatures. The "Beast People" are given human laws they cannot fully obey, and Moreau rules them through pain and fear. When Moreau dies, the creatures revert to their animal instincts, and Prendick barely escapes with his sanity.
This is the most direct descendant of Frankenstein in the list. Moreau is Victor Frankenstein without the guilt — a man who sees living creatures as raw material for his ambition. The novel forces the reader to confront a question Shelley also asked: where is the line between human and monster? Moreau's creatures are pitiable, dangerous, and heartbreakingly human. The novel's power comes from the fact that we recognise ourselves in them.
- Publication year: 1896
- Author: H.G. Wells
- Central theme: The ethics of scientific experimentation on living beings
- Connection to Frankenstein: Direct parallel to Victor's creation of life without moral consideration
3. The War of the Worlds (1898) — H.G. Wells
Invasion as a Mirror to Empire
Martians arrive in England on cylinder-shaped spacecraft and immediately begin destroying everything. Their heat-rays and black smoke are unstoppable. Human armies fall. The narrator watches his civilisation crumble in weeks — not through malice, but through the cold, efficient logic of a species that views humans the way humans view cattle.
The War of the Worlds takes Frankenstein's theme of the rejected other and flips it. This time, the reader is the other. The Martians are not monsters by choice — they are predators by nature, and humanity is prey. Wells wrote the novel as a critique of British imperialism, imagining what it would feel like to be on the receiving end of superior force. The terror is not just in the destruction, but in the realisation that we do to other species what the Martians do to us.
- Publication year: 1898
- Author: H.G. Wells
- Central theme: Imperialism, survival, and the fragility of civilisation
- Connection to Frankenstein: Both novels explore what happens when the "other" refuses to be ignored
4. The Invisible Man (1897) — H.G. Wells
Power Without Accountability
Griffin, a gifted physicist, discovers how to change his body's refractive index and become invisible. But he cannot reverse the process — and he does not care to. Invisibility does not make him a hero; it makes him a predator. He terrorises a small English village, murders a man, and ultimately forces the country to hunt him down. His death is not tragic; it is inevitable.
Griffin is Victor Frankenstein's evil twin. Both are brilliant. Both achieve the impossible. But where Frankenstein is paralysed by guilt, Griffin is liberated by the absence of consequences. The invisible man is what Victor might have become if he had no conscience. Wells understood that the real danger of power is not the power itself — it is the person who holds it.
- Publication year: 1897
- Author: H.G. Wells
- Central theme: The corrupting nature of unchecked power
- Connection to Frankenstein: A scientist who refuses moral responsibility for his creation
5. When Worlds Collide (1933) — Edwin Balmer and Philip Wylie
The End of Everything, and a New Beginning
Two rogue planets enter the solar system. One will destroy Earth. The other, Bronson Beta, might be habitable. A team of scientists, financiers, and chosen survivors races to build a spacecraft that can reach the new world before the old one is obliterated. The novel is a straight shot of disaster, planning, and moral compromise: who gets to survive? Who decides?
Published in 1933, When Worlds Collide is the newest book in this list and the only one by two authors. Its debt to Frankenstein is in its relentless focus on scientific ambition under pressure. The scientists in the novel must make decisions that would make Victor Frankenstein blanch — including selective breeding, euthanasia, and the destruction of entire cities to save resources. It is not a comfortable book. It is not meant to be.
- Publication year: 1933
- Authors: Edwin Balmer and Philip Wylie
- Central theme: Survival, sacrifice, and the ethics of choosing who lives
- Connection to Frankenstein: The moral weight of scientific decisions that affect all humanity
What These Science Fiction Classics Have in Common
Every book on this list shares one DNA strand with Frankenstein: the belief that science is not good or evil — it is dangerous when its creators refuse to look at its consequences. Victor Frankenstein creates a living being and runs away. Dr. Moreau creates sentient creatures and rules them through terror. Griffin invents invisibility and uses it to kill. The Time Traveller watches a future built on his own society's failures. The survivors in When Worlds Collide must decide who deserves a second chance.
None of these stories are comfortable. That is why they last. They force readers to ask the same question Shelley asked in 1818: if you had the power to break the rules of nature, would you? And would you still be human when you were done?
These five novels are available free, in full, because they were published before 1928 (with the exception of When Worlds Collide from 1933, which enters the public domain shortly). You can read them online or download them in PDF and EPUB. For readers who want them collected into one seamless bundle, browse classic science fiction collections organised by theme and delivered instantly.
If you loved Frankenstein (1818), these five science fiction classics — The Time Machine (1895), The Island of Doctor Moreau (1896), The War of the Worlds (1898), The Invisible Man (1897), and When Worlds Collide (1933) — will give you the same gut-punch of discovery, dread, and wonder. They are the direct descendants of Shelley's masterpiece, and they deserve to be read the same way: with the lights on and the questions left unanswered.
