Once Upon A Demon's Heart by K.M. Moronova | Dark Fantasy Romance | Paperback

Once Upon A Demon's Heart

From New York Times bestselling author K.M. Moronova comes a delicious arranged-marriage romantasy set in a world ravaged by war and ruled by vengeful gods. Love serves as both a weapon and a curse in this gripping tale of destiny and forbidden desire.

Plot Overview

Demigod knight Alira is cursed to relive her kingdom's destruction, dying repeatedly at the hands of the ruthless Blood Knight, demon commander Kalel Lornhelm. Desperate to break the cycle and save her people, Alira volunteers for a peace marriage proposed by the demons. Betrothed to her enemy—who is also the lost demon boy she once tried to save—Alira must navigate vengeance and forgiveness. Kalel, haunted by his past and internal hunger, struggles between hatred and a growing, forbidden attraction. As assassins close in and gods interfere, their intertwined destinies and the binding curse force them to confront their union.

• Arranged marriage
• Forbidden love
• Knotting
• Demons x Demi-gods
• Enemies to lovers
• Bloodsucking MMC

• Author: K.M. Moronova
• Book Series: Book 1 of 2 in the Cruel Fates Duet
• Binding: Paperback
• Edition: 1st Edition
• Language: English
• Print Length: 336 pages
• Publication Date: June 25, 2026
• ISBN-10: 1804962589
• ISBN-13: 978-1804962589
• Dimensions: 12.8 x 2.2 x 19.7 cm
• Weight: 230 g

Dive into this intense dark fantasy romance where Alira and Kalel fight for peace in Faultore, or risk dooming everyone they know.