What is the main idea for Zoobreak by Gordon Korman?

"Zoobreak" by Gordon Korman follows a group of kids who band together to rescue a gorilla named Luthor from a failing zoo. When their friend’s pet is in danger, they devise a clever plan to break into the zoo and save him. The story combines humor, adventure, and themes of friendship and bravery as the children navigate challenges and work as a team. Ultimately, it highlights the importance of standing up for what you believe in.