The Grimm Conclusion by Adam Gidwitz

This book is the third in the series, and I gave it a rating of four out of five. Jorinda and Joringel are twins who were "born" under a juniper tree. Joringel gets his head chopped off by his evil stepfather, and Jorinda becomes engaged to the prince. Her story is similar to the story of Cinderella, but it has major changes. She must face monsters, encounters unicorns, and the king hates her. Meanwhile, Joringel heads out on his own and finds new adventures. You're probably wondering how this is possible after Joringel lost his head. I'm not going to tell you. The children's stories go their separate ways, but they are destined to live happily ever after, maybe.

The entire series presents new versions of old fairy tales. The author has no problem describing new events in gross ways, so I'm giving you fair warning. Joringel has his body chopped up and added to a stew, so you'll enjoy the author's creativity if this doesn't bother you. The story is written as if the narrator is having a conversation with readers, and the narrator/author actually becomes a character later in the book. I found some parts of the plot were grosser than needed, but I appreciated the author's imagination and enjoyed the book overall.