O Saci by Monteiro Lobato

In this enchanting tale, a young boy named Pedrinho embarks on an adventurous journey into the heart of the Brazilian forest, where he encounters the mischievous and mythical creature known as the Saci. With only one leg, a red cap, and a penchant for playing pranks, the Saci becomes both a friend and a challenge for Pedrinho. As they navigate the wonders and mysteries of the forest, Pedrinho learns valuable lessons about courage, friendship, and the rich folklore of his homeland, all while unraveling the secrets of the elusive Saci.