My real rating for this book would be 2.5 stars, but I couldn't round up like I usually do. While I did like this book, there was just too much that I didn't like to push the rating that extra star. I had high hopes for this book. It sounded like a fun, quirky read that would leave me laughing and on the edge of my seat. And in some ways it was, but it also wasn't enough. 
 Let me start with the characters. Berry is an okay heroine, but not my favorite. There were times she was funny and added seriousness to the story, but then there were times that I found her boring and too serious. There is a fine line with a serious character, and sometimes Berry crossed that line. Mary, Berry's best friend (her full name is Mary Chris Moss, which I loved!), was a fun character with her awesome inventions. However, one thing that I did like about this story was the realistic nature of their friendship. It wasn't all happiness and butterflies between them. They had an argument, and were faced with some challenges, but as any true best friends would, they made it through. Now onto Tanner. Tanner was the classic snarky and arrogant boy that is amazingly hot. But, I couldn't really get into his character. I didn't believe in his and Berry's "relationship" because it never felt complete or even real. His character was also unbelievable to me. (view spoiler)[For an 18 year old to be a corporate spy for a company just didn't really line up for me. If he was 21, I could understand it more, but not someone who is 18, and had been a spy for several years already. I wish it didn't bother me as much as it did, but I just couldn't get past it (hide spoiler)]. 
 The story itself was at times believable but by the end it ventured into unbelievable territory. I don't really think that a 16 year old girl would be able to join her dad's business and be a private investigator. I know that they say, "No one expects a teenager," but it was another little thing that bothered me throughout the book. I understand that this was in the description of the book, but I just figured she was a bit older. I also didn't really believe the final reveal about her mother. It seemed a little extreme for the situation, in fact the whole book seemed to be a little extreme, and I think that was my ultimate problem. While it was fun at times, I mean who doesn't like a good spy novel, it just wasn't the best spy novel I've read. 
 I think this will appeal to many readers who like mystery and suspense, but don't be expecting the next great thing. It was a good read, but it was disappointing.