Left stranded in the Amazon jungle when their plane crashes on their way back to England from Manaus, Brazil, four children struggle to survive for days until one of them finds a map that leads them to a ruined city and a secret hidden among the vines.

During a hike with her brother through the Amazon rainforest, fifth-grader Lea discovers a badly injured baby sloth.

Twelve-year-old Coco Hidden has grown up in her mother's chocolate shop in Colorado, along with her friend Leo de la Cueva, but recently things have not been going well; the shop is failing, and Leo is hanging out with the other boys, and barely wants to talk to her--but when they both win a culinary contest, the two children and their mothers find themselves on a trip to the Amazon in Ecuador, where Coco hopes to find the rare ceiba tree, and where...