The product is a hardcover edition of the book "Once Upon a Demon's Heart" by K. M. Moronova, part of the Cruel Fates Duet Series. It falls under the genres of fiction, romance, and fantasy. The book is written in English and comes in a special Darkly Box and Bookish Box edition. This sealed edition is perfect for fans of the author and those who enjoy dark and romantic fantasy stories set in a captivating world.