This is the third book in this dragon series by Jessica Day George but I was able to follow the story easily without having read the first two books.  There were a few references to past events and characters but some context was given so I understood well enough.  The characters were believable with strong female heroines and male heros both among the dragons and humans sprinkled in among a few “bad guys”.  The plot was an exciting adventure fantasy with a satisfying outcome.  I would recommend this book to my 4th – 8th grade students.