Róbert Illés Book order (chronological)

Originally published in the United States by Christy Ottaviano Books/Henry Holt and Company, LLC.

Lost in the jungle! Bruno is on a trip to Colombia in his school holidays. His anthropologist uncle has taken him along on a visit to Don Rafael de Castillo, a descendant of a great explorer who is claimed to have discovered a lost City of Gold. But the secret of the city died with the explorer until now ... A fast-paced adventure full of real survival details and tips