The Case of the Fire Alarm (Electronic book text)

Buddy is starting his work as a therapy dog at Four Lakes Elementary School, where Connor attends and Mom is the principal. On his very first day, he accidentally knocks down a little kid on the playground, convincing the first grade teacher that school is no place for a dog. Then the fire alarm goes off. The school is evacuated but there's no fire . . . it's a false alarm. Who could have set it?