"Heartless" by Marissa Meyer is a young adult fiction novel published in 2017 in trade paperback format. The book falls under the genres of romance, paranormal, and supernatural, with elements of fairy tales and folklore. With 594 pages, this novel is sure to captivate readers with its thrilling and imaginative storyline, making it a must-read for fans of the genre. The author's storytelling prowess and the captivating plot make this book a standout addition to any collection.