Zero Day - Addie Webster disappeared from the governor's mansion 8 years ago. At the beginning of this book, she's escaped from her kidnappers and found her way home - but home is quite different as in her absence her father has become president of the United States. Everything is not quite as it seems... Although it got a bit predictable by the end, I really enjoyed the fast pace of the book.
To Catch a Cheat - To be honest, I didn't finish this one. This is the second in the series and I definitely think I should have started with the first one -
The Great Greene Heist. Fun, fast paced, realistic characters - there's a lot here to like. If you like the Randi Rhodes Detective novels I think you might like these as well. There's a lot here that's very realistic to middle school kids, but plenty of movie-type action as well.