I really liked Jack and Isobel. Although, I could have done without Olivia and Rachel. They both annoyed me. I'm interested to see what happens with Olivia in the next book.
Grace's parents frustrated me to no end. To me, those aren't parents.
I love alternating POV's so I'm glad I got to read into both their minds. I liked getting lost in the world of Mercy Falls and seeing through Sam's wolf eyes.