When a puppy who is being trained as a police dog goes missing, third-grader Judy forms a detective agency to solve the mystery, imitating her literary heroine, Nancy Drew.

The town's annual Turkey Trot race and festival is coming up, and Judy and Stink are training to win.

To start, Judy Moody doesn't have high hopes for third grade. Her new desk won't have an armadillo sticker with her name on it. Her new classroom will not have a porcupine named Roger. And with her luck, she'll get stuck sitting in the first row, where Mr. Todd will notice every time she tries to pass a note to her best friend, Rocky. An aspiring doctor, Judy does have a little brother who comes in handy for practicing medicine, a cool new pet, and...

"Judy Moody has a mood for every occasion, and now she has a mood ring to prove it! Judy's mood ring has extra special powers which have put her in a predicting mood, and her outrageous predictions have everyone wondering if she really is psychic." --