In the book Big Nate Blasts Off, there is rivalry between Randy Betancourt and Nate. Also they both like Ruby, which makes an even bigger rivalry between them. Eventually Randy and Nate become friends, but they still have one challenge, defeating Jefferson's students in Ultimate Mud Bowl. The Mud Bowl is something we all learn later on that Nate's dad invented. Later on it is revealed to us that Nate's dad was looking for a job but couldn't find one, and that they might move if his last interview doesn't go well. Then Nate's dad goes to the interview and completely nailed it and got a job, which meant they didn't have to move, now the Mud Bowl, Randy and Nate become friends and Randy is revealed to be great with the Frisbee, so he agrees to help P.S.38 win the Mud Bowl, when the time for the Mud Bowl arrives Randy turned out to be a real help because they win the Mud Bowl. And that is my short book review