While I feel like there's so much more to get to know about Ghost, I thought this was fantastic. I loved the supporting characters who were literally there to support Castle, though I was disappointed in the principal at his school. You can't just feel sorry for a kid and his circumstances when you work in education. But other than that, this was a sweet, emotional story.
Don't love that a major incident happened in a novella before this book, but then when I went back to the novella it was so brief it just seemed like she wrote it because she forgot to in the main books. I felt like I was missing something and even went back to reread the last part of book 18 didn't help. It started me off frustrated with the book and then it didn't really improve much from there.