""Good grief" means that Charlie Brown is having a tough day. When you get the Sunday scaries, or are bonked on the head by a football, it can be hard to shake off a bad mood. Whether you or someone you know is having a bad day, or feeling grouchy, jealous, anxious, or even bored, you can read this book as a reminder to take a beat, breathe in and out, and try something new until you start to feel okay again. You can always be exasperated again tomorrow!"-- Provided by publisher.