Most Popular Science Fiction Books of the 2020s

Starlight Alien Mail Order Brides #10

Rock Hard Alien

Skye MacKinnon

Science Fiction · Alien Romance · Gargoyle · HEA Ending · Monster Romance

September 3, 2026

Rome's Revolution Universe

Rei's Road to the Stars: The Birth of Rome's Revolution

Michael Brachman, Stephen Fisch

Science Fiction

January 2026

Sunshine Valley Orcs #1

The Orc's Protection

Alana Khan

Fantasy · Science Fiction · Monster Romance · Orc · Romantasy

June 28, 2026

Serpents of Serant #11

The Naga Wanderer's Wounded Mate

Robin O'Connor

Science Fiction · Alien Romance · Fated Mates · HEA Ending · Monster Romance

August 18, 2026

Shatter Me: The New Republic #3

Escape Me

Tahereh Mafi

Science Fiction · Dystopia · Young Adult · Romance

September 29, 2026

Alien Wolf Tales #8

Alien Tower

Honey Phillips

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

April 9, 2026

Sci-Fi Holiday Specials

The Alien Warrior's Valentine

Robin O'Connor

Science Fiction · Alien Romance · Adult · Valentine's Day Fiction · Romance

February 14, 2026

The ABCs of Alien Abduction #1

A is for Abduction

Honey Phillips

Science Fiction · Alien Romance · HEA Ending · Adult · Adventure

July 2, 2026

Alien Wolf Tales #6

Alien's Bargain

Honey Phillips

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

February 12, 2026

Serpents of Serant #10

The Naga Exile's Frozen Mate

Robin O'Connor

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

February 24, 2026

Holiday Heartmates #6

Stuffed by the Alien

Julie K. Cohen

Science Fiction · Alien Romance · Fated Mates · HEA Ending · Slow Burn Romance

October 15, 2026

Monster Mercenary Mates #8

Claimed by the Alien Mercenary

Robin O'Connor

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

January 27, 2026

Xarc'n Warriors #14

Chosen by the Hunter

Lynnea Lee

Science Fiction · Alien Romance · Dystopia · Post-Apocalyptic · Adult

March 19, 2026

Riftwake #1

Blightfall

Brandon Sanderson, Janci Patterson

Science Fiction · Young Adult

September 1, 2026

The Common #3

Wolfskin

Jeremy Szal

Science Fiction · Space Opera

March 26, 2026

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