Survival skills -- Juvenile fiction

Beck Granger 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 descendent 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.

When Beck Granger and his friend Peter are stranded in the Indonesian jungle, in the middle of a violent volcano erruption, they know that only the sharpest survival skills will get them to safety. Beck has navigated unknown wilderness before, but this jungle is crawling with danger.