Scat

Scat is a great book by Carl Hiaasen. Scat starts out when Bunny Starch mysteriously vanishes from everyone while on a field trip. A wildfire breaks out, she retrieves an asthma inhaler, a dash of tan rushes by, and she's gone. Nick and Marta, two kids, know something strange is going on, especially when the inhaler turns up. And the mystery doesn't just give itself away. There's a lot more happening than any one player can see. They'll reckon with an eco-friendly person, a stuffed rat, an oil rigger, and a panther, before they know what happened.