Oh my gosh, I loved this book. This is one of those rare books adults can enjoy just as much as the middle grade readers who are its target audience. It's a good story, but it is also well-written with bits of literary history and descriptions of various ciphers and codes. It is just so much fun. The author's note at the end tells the reader a bit about the book's background. Ms. Bertman grew up in San Francisco, the setting for the book, so I felt her description of the city must be pretty accurate. The young characters are very well-drawn and likable. The only character who didn't appeal to me was the social studies teacher, Mr. Quisling. I have a feeling that name was chosen with its meaning of "collaborating with the enemy" in mind. Although certainly not a villain in the story, he also is not really trustworthy for the young protagonists. The great thing about the story is that the reader is kept guessing right along with the kids. Best of all, the characters love books just as much as I do! For an adult reader, there is a thought-provoking set-up in which Emily (one of the lead characters) has (self-employed, with jobs that only require an internet connection) parents who are pursuing their dream of "living in all 50 states", which means they uproot the kids and move frequently, making the announcement of the next destination a big surprise to the kids. Emily's older brother has taken the disruptions in stride. He is apparently a pretty outgoing, unflappable kid. For Emily, however, it means she goes into each situation holding back, afraid to make attachments that will only so soon be broken. There are some really true-to-life descriptions of how the siblings have grown somewhat apart as they have grown up and developed interests that don't converge anymore. Yet, they still have strong affection for each other and, in the end, Emily's brother, Matthew, helps her find a way to cope with the many moves. I loved his advice to her: "'What I finally figured out with all our moving is you miss out on stuff whether you stay or go. So I decided to just go with it. Embrace how we live.'....Matthew was right---you missed out on stuff either way. Or you gained stuff, depending on your perspective." (page 234) The friendship between Emily and her landlord's son and fellow middle-schooler, James, is also sensitively presented. The reader gets to consider the importance of sometimes laying aside one's own pressing interests for the sake of helping a friend, and of how to resolve differences. I think that is what sets this book apart. Beyond the really good story-line, the reader is asked to think about the complexities of relationships with others: with one's family, one's friends, one's social setting.
I must admit, I stayed up "past bedtime" to finish the book because once you start reading, it is hard to tear yourself away. I can hardly wait to share it with my grandson!