Read the extras mentioned at then end of book 1

I am slightly annoyed that you have to read the extras mentioned at the end of book 1, about the guys convincing her to go to the dance with them; Because book 2 starts after that. So if you haven't read it you'll be confused on how she went from leaving them to protect them to... where this book starts.
Now
This book moves the story plot along nicely. There's tons of hints and clues throughout the book that keep the reader interested. And the ending is wonderfully sad. Can't wait to read book 3.