Lena's weekend plan was simple: camper van, kayak, gummy bears, that's it. But then she spots a suspicious caravan at the campsite, a man in a hat staring at her-and a tortoise that's supposedly a killer.
Of course, she writes everything down in her notebook. Of course, she investigates. And of course, it all ends deep underground, in a cave that isn't marked on any map.
Grandpa Andy would say, "Fabulously unwise." Lena says, "But exciting nonetheless."
Ages 10 and up-for everyone who doesn't want to leave adventures to chance.