Book 9 of 15... As I sit at soccer practice

I finished Attack of the Fluffy Bunnies while sitting and watching a soccer practice. It was an interesting story about a brother and sister (twins) who were dropped off at camp by their parents. As camp started odd things started to happen that they were blamed for. So, in their search for the truth they discovered an alien species of Fluffy Bunnies who eat sweets and hypnotize people to take over their bodies.