5 greatest sci-fi books of the 2020s, ranked

While the majority of 21st-century sci-fi has focused on post-apocalyptic narratives, 2020s sci-fi has been heavily defined by real-world anxieties about the ethics of artificial intelligence, space exploration, and climate change. Moving past dystopian tropes, modern authors have shifted the landscape to explore themes of synthetic consciousness and community resilience.

The past few years have seen further exploration of extremely niche subgenres of climate fiction (cli-fi), solarpunk, cozy sci-fi, and the resurgence of 20th-century hard science fiction. Alongside realistic depictions of science in hard sci-fi, there has been a massive surge in cozy, optimistic, and character-driven space operas.

A Psalm for the Wild-Built Is The Pinnacle of Cozy Sci-Fi

Written by the author of The Long Way to a Small, Angry Planet, one of the best sci-fi books of the last 25 years, Becky Chambers' A Psalm for the Wild-Built is a 2021 novella and the first in the Monk & Robot duology. Widely celebrated as one of the standout science fiction books of the decade, this Hugo Award-winning novella has been compared to Studio Ghibli films for its cozy, nature-focused atmosphere and gentle buddy-comedy chemistry.

A cozy, philosophical story set on the habitable green moon of Panga, AI and robots left humanity's urbanized, industrialized societies and disappeared into the wilderness. Without AI, robot workers, and high-tech automated factories, humans learned to commit to a natural and sustainable future of farms and small communities.

The novella follows Sibling Dex — a tea monk suffering from unexplainable existential dread — who leaves their monastery to travel and find meaning. In the wilderness, Dex meets Splendid Speckled Mosscap, a self-aware robot sent to check in on humanity. Together, Dex and Mosscap embark on a journey to answer the fundamental question — "What do people need?"

A Psalm for the Wild-Built is a quintessential example of the solarpunk sub-genre that imagines a hopeful, ecologically sustainable future where humanity has successfully overcome climate catastrophe to live in balance with nature. Set in a queer-normative utopia, the book features prominent LGBTQIA+ representation in its non-binary human protagonist, Dex, and their deep, affirming friendship with the agender robot, Mosscap.

This comforting solarpunk novella encapsulates contemporary cozy science fiction that has exploded in popularity. Prioritizing healing, community, and everyday life over galaxy-ending wars, critics have praised the book for its philosophical and unhurried pacing. Exploring themes of purpose, sustainability, and human connection, this 150-page novella is a quick and accessible gateway book into sci-fi for readers who don't normally gravitate towards the genre.

The Ministry for the Future Is the Definitive Cli-Fi Novel

Published in 2020, Kim Stanley Robinson's The Ministry for the Future is a vital, near-future cli-fi novel exploring how humanity might realistically tackle a catastrophic climate crisis over the next few decades. Triggered by a deadly Indian heatwave, the UN creates the titular Zurich-based agency to advocate for the rights of the world's future citizens as if they were as valid as the present generations.

Established under the real-life Paris Agreement, the Ministry is headed by Mary Murphy, but the true protagonist of this hard sci-fi novel is the changing world over several decades. Set in the near future, it explores geoengineering, eco-terrorism, and a global "carbon coin" — a digital currency designed to pay those actively avoiding carbon emissions — to force systemic change.

Classified as hard sci-fi, The Ministry for the Future emphasizes scientific accuracy and nonfiction descriptions of history and social sciences. A highly influential example of climate fiction, the novel details the near-future impacts of extreme climate change and explores the practical, political, and economic mechanics of global survival following a catastrophic heatwave that kills millions.

Though writers are tackling the realities of a warming planet, Robinson's novel is unique among the growing body of climate fiction for sparking massive discussions and radical policy changes. While other books illustrate dystopian future societies as an end product of climate change, The Ministry for the Future explores a bridged time period where the effects of global warming are mitigated.

Blending harrowing speculative reality with visionary optimism, the novel examines how humanity might just stop climate change through radical financial reforms, atmospheric geoengineering, and extralegal "dirty ops" to ensure its survival. With elements of utopian fiction, the novel portrays a world joined together to address a potential catastrophe. A sweeping sci-fi story, The Ministry for the Future is the definitive cli-fi book of the decade and has set a new benchmark for realistic depictions of climate change.

Remote Control Is by the Leading Africanfuturist Author

Author of Binti, the Hugo and Nebula Award-winning space opera trilogy, Remote Control by Nnedi Okorafor is a brilliant, genre-bending science fiction novella. Set in corporate-controlled Ghana in the near future and in the same universe as her previous books, Who Fears Death and The Book of the Phoenix, the book follows Fatima, an ordinary girl who touches a glowing alien seed and gains the power to emit a lethal green light.

Renamed "Sankofa" and dubbed Death's adopted daughter, the protagonist is feared and revered as she becomes a figure of local legend. With the title referring to her powers, she can end a life or break technology in a flash and from a considerable distance, "like a remote control." Wandering alone with only a fox for company, Sankofa searches for the meteor seed that was stolen by the massive, all-encompassing tech corporation, LifeGen.

Heavily influenced by her own dual Nigerian and American heritage, Okorafor's writing is not only the pinnacle of Africanfuturism, but the sub-genre itself is a term she coined in 2018. It is a sci-fi sub-genre centered on the fusion of African culture, history, mythology, and technology, with narratives and characterization based in Africa. Masterfully blending West African folklore with gripping sci-fi thriller elements, Okorafor's 2021 novella is one of the most uniquely moving sci-fi stories of the decade.

Remote Control does not feature a traditional, action-heavy hero's journey but instead serves as a profound character study. The novella explores themes of the duality of technology, corporate greed and exploitation, and the heavy, isolating burden of unexpected power. Focusing on redefining oneself after trauma, the novella is an emotional coming-of-age story that follows Sankofa on her quest to reclaim her humanity and her past.

Network Effect Is The First Novel-Length MurderBot Book

The fifth installment in The Murderbot Diaries, Martha Wells' Network Effect, is the first full-length novel in the series. Highly praised, the novel was a massive critical hit and swept several major speculative fiction awards by winning the 2021 Nebula Award for Best Novel, Locus Award for Best Science Fiction Novel, and the Hugo Awards for Best Novel and Best Series for Murderbot Diaries.

While marketed as a standalone, it is highly recommended to read the preceding stories — starting with All Systems Red, one of the best sci-fi novels of the last decade — before moving on to Network Effect to fully understand the deep relationship and character history. The book follows the titular "Murderbot", a socially anxious cyborg Security Unit who has disabled their restrictive "governor" controls and staves off boredom by watching soap operas.

Published in 2020, it follows the sardonic SecUnit accompanying its human clients on a research expedition. When hostile raiders kidnap the crew, Murderbot is forced to act as the routine mission quickly evolves into a high-stakes rescue involving contaminated alien remnant technology. Cementing the snarky, media-binging security android as a modern sci-fi icon, Network Effect is a hilarious and action-packed adventure that is widely considered one of the standout sci-fi novels of the 2020s.

Focusing on deep philosophical AI themes of sentience, identity, and autonomy, the novel explores the psychological impact of trauma, character development, and found family. Though Murderbot constantly denies having any feelings for the client humans it protects, this full-length novel allows the protagonist to wrestle with profound emotional growth as it struggles to reconcile misanthropy with its fierce loyalty to their chosen family.

Project Hail Mary Encapsulates Modern Hard Science Fiction

Adapted into a blockbuster box-office smash hit that quickly became one of the highest-grossing films of 2026, Project Hail Mary is the 2021 hard science fiction novel by Andy Weir. This epic survival story follows a junior high school teacher with a PhD in molecular biology, Ryland Grace — portrayed by Ryan Gosling in the recent movie adaptation — who wakes up aboard an interstellar spacecraft with no recollection of how he got there.

Learning he is the sole survivor of a three-person crew that was traveling towards the Tau Ceti system, 11.9 light years from Earth, the lone astronaut remembers that he is on a desperate mission to save the dimming sun from a solar energy-eating organism called "Astrophage." With an unlikely extraterrestrial ally, the book features a unique alien friendship that defies profound biological, atmospheric, and linguistic barriers.

Another brilliant, physics-heavy novel by Andy Weir, Project Hail Mary is widely celebrated as one of the best hard sci-fi books of the 21st century. Captivating readers with his signature, gripping "science the heck out of it" approach, Andy Weir has been hailed for revitalizing classic, problem-solving sci-fi. Grounding its narrative in real, rigorous physics, chemistry, and biology, the novel uses Ryland Grace's "competent man" archetype to solve extreme problems and extinction-level threats.

While it is legendary among readers for its highly plausible, mathematically heavy approach and unique take on alien life, Project Hail Mary leans towards the more accessible speculative side of hard sci-fi. Using a sun-eating microorganism and an incredibly durable super-material called xenonite helps make complex scientific concepts more accessible and riveting for readers.

Using alternating timelines between Grace's memories of Earth and his current life-or-death situation, the novel keeps the momentum driving forward with its suspenseful, high-stakes plot and addictive pacing. Highly praised for the incredible emotional depth that the novel's endearing characters bring to the narrative, Project Hail Mary is uniquely wholesome with the unlikely but delightful interspecies friendship that serves as the heart of the story.