Most Popular Science Fiction Books of the 2020s

The League of Extraordinary Gentlemen

The League of Extraordinary Gentlemen

Cássio Dorfschmidt

Science Fiction · Steampunk · Adventure · Alternate History · Historical Fiction

February 3, 2025

Dream Team Shifters #5

Her Enemy Dragon Captor

Leela Ash

Fantasy · Science Fiction · Alien Romance · Dragons · Fated Mates

April 14, 2025

The Last Horizon #4

The Pilot

Will Wight

Fantasy · Science Fiction

July 1, 2025

Taurean Warriors

Mistletoe Mishaps

Melody Beckett

Science Fiction · Alien Romance · Adult · Christmas Fiction · Romance

March 3, 2025

Serpents of Serant #8

The Naga Shaman's Pregnant Mate

Robin O'Connor

Science Fiction · Alien Romance · Fated Mates · Monster Romance · Naga

July 1, 2025

Monster Mercenary Mates #5

Saved by the Alien Mercenary

Robin O'Connor

Science Fiction · Alien Romance · Fated Mates · Monster Romance · Adult

April 29, 2025

Abducted by the Ruthless Royal: Planet Sanos

Taken by the Alien Triton King

Robin O'Connor

Fantasy · Science Fiction · Alien Romance · Fated Mates · Post-Apocalyptic

June 4, 2025

Alien Wolf Tales #3

Alien Charming

Honey Phillips

Science Fiction · Alien Romance · Fairy Tale Retellings · Adult · Retellings

April 24, 2025

Undying Mercenaries #24

Demon World

B. V. Larson

Science Fiction · Hard Science Fiction · Space Opera

August 17, 2025

Starship of the Ancients #1

Stranded

A.K. DuBoff

Science Fiction · Space Opera

February 7, 2025

Rise of a Legend #1

Trial by Fire

Riech Cruz

Science Fiction · Romance

January 27, 2025

Cosmic Mates #6

Double Bind

Cara Bristol

Science Fiction · Romance

March 31, 2025

Above the Black #2

Among Serpents

Marc J Gregson

Fantasy · Science Fiction · Dystopia · Young Adult

January 7, 2025

Alien Wolf Tales #2

Alien Huntsman

Honey Phillips

Science Fiction · Alien Romance · Fairy Tale Retellings · Monster Romance · Adult

March 20, 2025

Backyard Starship #26

Wolves Among the Stars

J.N. Chaney, Terry Maggert

Science Fiction · Space Opera

March 23, 2025

Wolfhounds #6

End Game

John Van Stry

Science Fiction

August 17, 2025

Monster Mercenary Mates #4

Entangled by the Alien Mercenary

Robin O'Connor

Science Fiction · Alien Romance · Monster Romance · Adult · Romance

March 11, 2025

Backyard Starship #25

Fist of Orion

J.N. Chaney, Terry Maggert

Science Fiction · Space Opera

January 15, 2025

Serpents of Serant #7

The Naga Princess's Soldier Mate

Robin O'Connor

Science Fiction · Alien Romance · Monster Romance · Naga · Adult

January 14, 2025

Adventures of a Jump Space Accountant #8

A Free Trader

Andrew Moriarty

Science Fiction · Space Opera

December 21, 2025

The Maze Cutter #3

The Infinite Glade

James Dashner

Science Fiction · Dystopia · Young Adult

September 9, 2025

The Buzzer War #1

Steel on Target

Kevin Ikenberry

Science Fiction · Military Science Fiction

September 24, 2024

Advent of the Apocalypse #1

Advent of the Apocalypse

V.A. Lewis, D. Pidge

Fantasy · Science Fiction · LitRPG · Post-Apocalyptic

October 22, 2024

Warhammer 40,000

Dominion Genesis

Jonathan D Beer

Science Fiction · Dystopia · Military Science Fiction · Warhammer

September 21, 2024

Fated Mates of the Ferlaern Warriors #1

Enticed by an Alien Warlord

Ava Ross

Science Fiction · Alien Romance · Adult · Romance

January 8, 2024

Four Minutes

Jeffrey Wilson, Brian Andrews

Science Fiction · Thriller

April 2, 2024

Romance Collections Limited Editions #14

Beyond Earth

Robin O'Connor, Leslie Chase, Stephanie Morris, Alina Riley, Candice Gilmer, Lola Blix, Celia Breslin, Sky Robert

Science Fiction · Alien Romance · Dragons · Vampires · Werewolves

December 11, 2024

Monster Mercenary Mates #3

Betrothed to the Alien Mercenary

Robin O'Connor

Science Fiction · Alien Romance · Monster Romance · Adult · Romance

December 10, 2024

Forbidden Bonds

Forbidden Bonds Collection Two

Cara Bristol

Science Fiction · Alien Romance · Adult · Collection · Romance

November 4, 2024

Forbidden Bonds

Forbidden Bonds Collection One

Cara Bristol

Science Fiction · Alien Romance · Adult · Collection · Romance

November 4, 2024

At The Alien Hotel #3

Oh No, I Shot A Spaceship And Kissed An Alien Cyberchef

Kate Sinner

Science Fiction · Alien Romance · Short Stories · Romance

October 3, 2024

Dragon Brides #10

Pine

Kate Rudolph

Fantasy · Science Fiction · Alien Romance · Dragons · Fated Mates

November 5, 2024

Rescued by the Alien

Rudi

Honey Phillips

Science Fiction · Alien Romance · Adult · Christmas Fiction · Romance

November 8, 2024

Backyard Starship #24

The Enemy Within

J.N. Chaney, Terry Maggert

Science Fiction · Space Opera

November 10, 2024

The Klendathian Cycle #1

Kidnapped by the Alien Chieftain

Lara Roth

Science Fiction · Alien Romance · Space Opera · Romance

September 25, 2024

Sentience Hazard

Alexandru Czimbor

Science Fiction · Dystopia · Thriller

May 14, 2024