This was a gift for my daughter for Christmas. I wasn't sure how it would go, but I'd done a lot of research, and this was pretty highly reviewed.
A curse on the island of Envecor has caused everyone's heart to be outside their body. Some take care of it, while others aren't as caring. It's also made everyone immortal until they find their soulmate. Once they do that, they can leave the island, grow old and die. Some people don't want that to happen. One of those people is the king, so he hires Psyche, a heart hunter. She is tasked with tracking down the king's soulmate and killing them.
There's a lot to love in this book. The illustrations are bold and beautiful, and the story takes you on a journey of pain and healing. Psyche starts out as a tough as nails type, but as hard as she tries, she can't prevent her softer side from peeking through her own armor.
I don't know why this doesn't have more exposure. It's a self-contained story, and it's really good. It easily gets a Good Book! ranking from me.