Throne of Nightmares (Prince of Sin Series #3)
“Beware of waking the gods, their dreams are often our nightmares...”

A book of dangerous magic draws two readers into a perilous quest to find it—and their own happy ending—in this action-packed standalone fantasy romance from New York Times bestselling sensation Kerri Maniscalco.


A prince who prefers games of the head to those of the heart.

Prince Sloth hates leaving his enchanted library, but when a forgotten deity threatens the very fabric of the Underworld, he’s thrust into a race against time. He must find the Book of Nightmares—an ancient artifact that has the power to break worlds—before it unleashes a deadly game to free its master, the Goddess of Night.  When a betrayal leaves him marked, and desperate, his path collides with a young woman who possesses the legendary Phoenix Tear—a portal stone unlike any other. 

A librarian who is all sweet sunshine…until she burns.

Lore Brimstone has always loved getting lost in a book—but she never meant literally. Yet, after visiting a traveling caravan, she quickly finds herself transported to a terrifying but oddly familiar world—with the worst, twisted prince at her side. Realizing they are living out her favorite novels one by one, they face off against an increasingly dark magic as they try to survive the story.

A twisted tale that means they can’t trust themselves—or their hearts.

As Lore and Sloth navigate the pages of her beloved novels gone wrong, she must channel her inner main character to defeat the Book of Nightmares before the wall between the gods and mortals comes crashing down, dooming them all.
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Throne of Nightmares (Prince of Sin Series #3)
“Beware of waking the gods, their dreams are often our nightmares...”

A book of dangerous magic draws two readers into a perilous quest to find it—and their own happy ending—in this action-packed standalone fantasy romance from New York Times bestselling sensation Kerri Maniscalco.


A prince who prefers games of the head to those of the heart.

Prince Sloth hates leaving his enchanted library, but when a forgotten deity threatens the very fabric of the Underworld, he’s thrust into a race against time. He must find the Book of Nightmares—an ancient artifact that has the power to break worlds—before it unleashes a deadly game to free its master, the Goddess of Night.  When a betrayal leaves him marked, and desperate, his path collides with a young woman who possesses the legendary Phoenix Tear—a portal stone unlike any other. 

A librarian who is all sweet sunshine…until she burns.

Lore Brimstone has always loved getting lost in a book—but she never meant literally. Yet, after visiting a traveling caravan, she quickly finds herself transported to a terrifying but oddly familiar world—with the worst, twisted prince at her side. Realizing they are living out her favorite novels one by one, they face off against an increasingly dark magic as they try to survive the story.

A twisted tale that means they can’t trust themselves—or their hearts.

As Lore and Sloth navigate the pages of her beloved novels gone wrong, she must channel her inner main character to defeat the Book of Nightmares before the wall between the gods and mortals comes crashing down, dooming them all.
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Throne of Nightmares (Prince of Sin Series #3)

Throne of Nightmares (Prince of Sin Series #3)

by Kerri Maniscalco
Throne of Nightmares (Prince of Sin Series #3)

Throne of Nightmares (Prince of Sin Series #3)

by Kerri Maniscalco

Hardcover

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    Available for Pre-Order. This item will be released on February 10, 2026

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Overview

Notes From Your Bookseller

Prepare to be thrust into the lush, Gothic world where a new demon prince awaits, ready to steal your heart. The next action-packed and highly addictive standalone fantasy romance from Kerri Maniscalco is finally available for pre-order. Fans of Kingdom of the Wicked can now count down the days until The Prince of Sin series returns with a new twisted tale.

“Beware of waking the gods, their dreams are often our nightmares...”

A book of dangerous magic draws two readers into a perilous quest to find it—and their own happy ending—in this action-packed standalone fantasy romance from New York Times bestselling sensation Kerri Maniscalco.


A prince who prefers games of the head to those of the heart.

Prince Sloth hates leaving his enchanted library, but when a forgotten deity threatens the very fabric of the Underworld, he’s thrust into a race against time. He must find the Book of Nightmares—an ancient artifact that has the power to break worlds—before it unleashes a deadly game to free its master, the Goddess of Night.  When a betrayal leaves him marked, and desperate, his path collides with a young woman who possesses the legendary Phoenix Tear—a portal stone unlike any other. 

A librarian who is all sweet sunshine…until she burns.

Lore Brimstone has always loved getting lost in a book—but she never meant literally. Yet, after visiting a traveling caravan, she quickly finds herself transported to a terrifying but oddly familiar world—with the worst, twisted prince at her side. Realizing they are living out her favorite novels one by one, they face off against an increasingly dark magic as they try to survive the story.

A twisted tale that means they can’t trust themselves—or their hearts.

As Lore and Sloth navigate the pages of her beloved novels gone wrong, she must channel her inner main character to defeat the Book of Nightmares before the wall between the gods and mortals comes crashing down, dooming them all.

Product Details

ISBN-13: 9780316557924
Publisher: Little, Brown and Company
Publication date: 02/10/2026
Series: Prince of Sin Series , #3
Pages: 384
Product dimensions: 6.00(w) x 9.25(h) x (d)

About the Author

About The Author
Kerri Maniscalco grew up in a semi-haunted house outside NYC where her fascination with gothic settings began. In her spare time she reads everything she can get her hands on, cooks all kinds of food with her family and friends, and drinks entirely too much tea while discussing life’s finer points with her cats. She is the author of the instant New York Times bestsellersThrone of the Fallen and Throne of Secrets, as well as the #1 New York Times and USA Today bestselling author of the Stalking Jack the Ripper series and the Kingdom of the Wicked series.
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