Most Popular Adult Books of the 2020s

The Age of Blood #2

Lord of Ruin

K. M. Enright

Fantasy · Vampires · Adult

August 12, 2025

The Five Kingdoms #2

The Orc's Promised Bride

Honey Phillips

Fantasy · Orc · Adult · Romance

January 2, 2025

The Oak and Holly Cycle #2

The Robin on the Oak Throne

K.A. Linde

Fantasy · Dystopia · Adult

June 17, 2025

Monstrous Meet Cutes #4

Checked Out by the Chupacabra

Wendi Guff

Fantasy · Monster Romance · Paranormal Fantasy · Paranormal Romance · Adult

June 5, 2024

Fated Mates of the Ferlaern Warriors #1

Enticed by an Alien Warlord

Ava Ross

Science Fiction · Alien Romance · Adult · Romance

January 8, 2024

Monster Mercenary Mates #3

Betrothed to the Alien Mercenary

Robin O'Connor

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

December 10, 2024

A Yule Be Mine Monster Romance

Jilted by Jack Frost

Alexa Ashe

Fantasy · Monster Romance · Paranormal Romance · Adult · Christmas Fiction

November 12, 2024

Hillcrest Hollow Shifters #1

Bound to the Dragon

Vala Stone

Fantasy · Dragons · Nymph · Paranormal Fantasy · Paranormal Romance

November 15, 2024

My Fake Orc Date

S.R. Griffith

Fantasy · Monster Romance · Orc · Paranormal Fantasy · Paranormal Romance

November 1, 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

Rescued by the Alien

Rudi

Honey Phillips

Science Fiction · Alien Romance · Adult · Christmas Fiction · Holiday/Seasonal

November 8, 2024

Romance Café Collection #33

Shifting Love

Robin O'Connor, Sabrina Silvers, Serafina Jax, Lisabel Chretien, Aurelia Foxx, Suki McMinn, Gabbi Grey, Jade Thorn, Minda Knight, Harper Michaels, Kataya Moon

Paranormal Romance · Adult · Anthology · Collection · Shapeshifters

September 18, 2024

Luna Battle #1

Luna Battle: The Game

Billiejo Priestley

Fantasy · Dark Fantasy · Paranormal Romance · Reverse Harem · Adult

August 31, 2024

Serpents of Serant #6

The Naga Inventor's Clever Mate

Robin O'Connor

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

October 22, 2024

Rumbling Rattlers - A MC Monster Romance Short

Elliot Ason

Monster Romance · Paranormal Romance · Adult · Short Stories · Romance

August 2, 2024

Alien Abduction #23

Willow and the Wraith

Honey Phillips

Science Fiction · Alien Romance · Adult · Romance

August 22, 2024

Starlight Brides

Alien Triton's Prize

Lynnea Lee

Science Fiction · Alien Romance · Mermaid · Monster Romance · Paranormal Romance

September 12, 2024

Alien Abduction #22

Vera and the Victor

Honey Phillips

Science Fiction · Alien Romance · Gargoyle · Adult · Romance

July 25, 2024

Alien Abduction #21

Unity and the Usurper

Honey Phillips

Science Fiction · Alien Romance · Adult · Romance

June 27, 2024

Treasured by the Alien #12

Hope for the Alien Warrior

Honey Phillips

Science Fiction · Alien Romance · Adult · Romance

November 24, 2024

Monster Mercenary Mates #2

Stolen by the Alien Mercenary

Robin O'Connor

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

August 13, 2024

The Fate of Ashes #1

A Crown of Star & Ash

Victoria K. Taylor

Fantasy · Adult · Romance

March 22, 2024

The Dead Cat Tail Assassins

P. Djèlí Clark

Fantasy · Adult

August 6, 2024

Dragon Brides #8

Knox

Kate Rudolph

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

October 4, 2023

Aliens Love Single Moms #1

Cadence

Tasha Black

Science Fiction · Alien Romance · Adult · Romance

December 24, 2022

Xarc'n Warriors: Mountains #1

Hunter's Quest

Lynnea Lee

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

April 7, 2022

Stranded With an Alien

Taliz

Alana Khan

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

November 11, 2022

The Vengeance Trilogy #3

Vengeance Denied - A Dystopian Rebel Romance

Zoey Indiana

Science Fiction · Cyborg Romance · Dystopia · Epic Fantasy · High Fantasy

May 27, 2021

Alien Adoption Agency #2

Kade

Tasha Black

Science Fiction · Alien Romance · Dragons · Paranormal Romance · Adult

January 21, 2021

Alien Castaways #5

Inferno

Cara Bristol

Science Fiction · Alien Romance · Demon · Adult · Romance

June 25, 2021

Alien Castaways #4

Shadow

Cara Bristol

Science Fiction · Alien Romance · Adult · Romance

April 22, 2021

Alien Castaways #6

Tigre

Cara Bristol

Science Fiction · Alien Romance · Adult · Romance

August 16, 2021

Alien Adoption Agency #1

Noxx

Tasha Black

Science Fiction · Alien Romance · Dragons · Paranormal Romance · Adult

January 7, 2021

Xarc'n Warriors #5

Rescued by the Hunter

Lynnea Lee

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

August 19, 2021

Single Daddy Shifters #1

Axel

Tasha Black

Fantasy · Paranormal Fantasy · Paranormal Romance · Adult · Shapeshifters

January 1, 2020