The case of the disappearing pets

"Pets. Mina doesn't have any. This is super inconvenient when it's Showcase Your Pets week at school. Unfortunately, Mina's best friend Holly doesn't have any pets either now that her hamster's gone missing. And has anyone seen Danny's pet toad? An explosion at the local pet shop shows Mina that this pet palaver can't be a coincidence. But why is someone stealing all the animals? What do they want them for?"--Provided by publisher.