El monstruo del río Nesi (Aprender a leer con... Los Detectives Zoopencos, 1)

Deep in the forest, among wild animals: a hyena, a pig, and a bat in a suit. Murci, Risa, and Gorrino, hunting for a thousand clues, for they are also detectives: no case is too tough. Something smells rotten in the forest, where could that foul odor be coming from? The animals suspect the Zoopencos, but Murci, Risa, and Gorrino will use their magnifying glass to discover who the mysterious monster of the River Nesi really is.