3.5 stars. I gave the first book in the series 4 stars and didn't like this one as much as the first, hence the rating. BUT I did still like it! I listened to the audiobook (awesome reader!).
Yay for my third audiobook! My very first audiobook ever was over the summer and just so happened to be the first book in this series, A Spy in the House, which I really wanted to read...and my library only carried the audiobook, so I gave her a whirl. And loved it. Let me just say that Justine Eyre, the audiobook narrator for this series, is phenomenal. She really puts you into the story. That said, I did like this book. However, I liked the first book much more, so this one gets a 3.5 instead of a 4. I'll try not to compare them too much, though!
See my full review here