Three... Two... One... BOO Isla Walsh is a prankster, and her favorite person to pull one over on has to be her principal, Andry Murphey. But Isla isn't all fun and games, and her sixth grade students will attest to that. Behind every prank Isla plays hides a secret she hasn't shared since she moved to Cheyenne. She's not the happy person she seems to be. In fact, she's pretty certain everyone will leave her...