Hard to write a review of this AWESOME book without giving too much away, but it was even better than the first four! The details of spying make me think that either the author is really good at research or has a background that she isn't telling us about. I love how supportive her friends are, how her mother and aunt are worried but not overly in her face, and how Zach doesn't doubt Cammie's abilities but checks up on her none the less. Also, the girl on the cover is not a stick. Hooray.