Most Popular Science Fiction Books of 2025

The Last Kids on Earth #10

The Last Kids on Earth and the Destructor's Lair

Max Brallier

Horror · Science Fiction · Young Adult

November 4, 2025

The Hunger Games

Sunrise on the Reaping

Suzanne Collins

Science Fiction · Dystopia · Young Adult · Movie

March 18, 2025

Canis Alpha

W.K. Greyling, Aldus Webb

Science Fiction · Dystopia

April 1, 2025

Exiles War #1

Fleet of the Forgotten

Dan Thornton

Science Fiction · Hard Science Fiction · Military Science Fiction · Space Opera

November 6, 2025

Codex Ananta #1

Eternal

Soham Kale

Science Fiction · Hard Science Fiction

August 29, 2025

The Vrix #2

The Delver

Tiffany Roberts

Science Fiction · Alien Romance · Romance

October 7, 2025

The Fourth Consort

Edward Ashton

Fantasy · Science Fiction

February 25, 2025

Starship of the Ancients #2

Lost Planet

A.K. DuBoff

Science Fiction · Space Opera

June 27, 2025

Battles of the Republic #1

The Intus Invasion

James Rosone, Brandon Ellis

Science Fiction · Space Opera

May 15, 2025

Alien Wolf Tales #1

Big, Bad Alien

Honey Phillips

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

January 23, 2025

Where the Axe is Buried

Ray Nayler

Science Fiction · Cyberpunk · Dystopia · Social Science Fiction

April 1, 2025

Across Time and Starlight

Alessandro Candotti

Fantasy · Science Fiction · Fairies · Adventure

September 17, 2025

Xarc'n Warriors

Holly and the Hunter

Lynnea Lee

Science Fiction · Alien Romance · Dystopia · HEA Ending · Post-Apocalyptic

December 4, 2025

At The Alien Hotel #4

Oh No, I Carved A Pumpkin And Kissed An Alien Diplomat

Kate Sinner

Science Fiction · Alien Romance · Halloween Fiction · Novella · Romance

October 29, 2025

Treasured by the Alien #14

Baby for the Alien Warrior

Honey Phillips

Science Fiction · Alien Romance · Adult · Romance

November 16, 2025

Operator Chronicles #2

Fire Team Nomad

Will Crudge

Science Fiction · Military Science Fiction

November 11, 2025

Horned Holidays #5

A Klaus Encounter

Honey Phillips

Science Fiction · Alien Romance · Adult · Winter Fiction · Romance

December 4, 2025

Gladiators of the Vagabond

Enticed by the Alien Chef

Robin O'Connor

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

September 16, 2025

Serpents of Serant #9

The Naga Scout's Daring Mate

Robin O'Connor

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

November 11, 2025

Vaxxlian Alien Mail Order Brides #8

Lorrd

Sue Mercury

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

September 25, 2025

Monster Mercenary Mates #7

Tempted by the Alien Mercenary

Robin O'Connor

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

December 9, 2025

OrcFire #8

Thankful for My Orc

Alana Khan

Fantasy · Science Fiction · Monster Romance · Orc · Romantasy

October 26, 2025

OrcFire #9

Orc The Halls

Alana Khan

Fantasy · Science Fiction · Monster Romance · Orc · Paranormal Romance

November 30, 2025

Alien Abduction #25

Yasmin and the Yeti

Honey Phillips

Science Fiction · Alien Romance · Yeti · Adult · Romance

August 7, 2025

Intergalactic Dating Agency

Romancing the Alien 10 Year Anniversary Bundle

Demelza Carlton, Kate Rudolph, Sophie Stern, Michelle M. Pillow, Skye MacKinnon, Sue Mercury, Candice Gilmer, Tamsin Ley, Elsa Jade

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

June 16, 2025

Cosmic Mates #8

Alien Spare

Cara Bristol

Science Fiction · Alien Romance · Romance

September 22, 2025

Cosmic Mates #7

Alien Heir

Cara Bristol

Science Fiction · Alien Romance · Romance

July 21, 2025

Treasured by the Alien #13

Legacy for the Alien Warrior

Honey Phillips

Science Fiction · Alien Romance · Adult · Romance

June 15, 2025

Wish Upon the Stars #8

Wish Upon the Stars 8

Malcolm Tent

Fantasy · Science Fiction · LitRPG · Young Adult

May 26, 2025

Monster Mercenary Mates #6

Chased by the Alien Mercenary

Robin O'Connor

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

August 12, 2025

Alien Wolf Tales #4

Cursed Alien

Honey Phillips

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

May 22, 2025

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