The secret, magical Lost Jungle in the Amazon is in danger...

At the age of eleven, boys in Tumi's rainforest tribe spend eleven days away from the tribe, living on their own. Most of the boys encounter the everyday plants and animals of the jungle. Tumi stumbles into the Lost Jungle, a hidden land of magic. During his adventure there, he meets three more eleven-year-olds each with a quest of their own. They uncover a plan to clear away some of the jungle to make way for a cattle ranch. They have help from a variety of creatures along the way, but is it enough? How can four kids save the Lost Jungle?

This is three books in one! The Unicorn Guide, Castle in the Amazon and The Mimicbird's Flight make up the complete trilogy. This story follows The Quests of Underice, but can also be read on its own.