In Trouble Again

Redmond O'Hanlon had a shortage of volunteers when he planned his second expedition: everyone had heard about the first. So he was forced to recruit an old friend who had no idea what he was letting himself in for. But the O' Hanlon had no idea either. Until, that is, he decided they should be the first to climb a South American mountain starting from a swamp and then trek down a river in search of a fierce tribe who hit people's heads with long clubs. How they did this and what exactly they found makes for the gripping tale of how Redmond O' Hanlon found himself in trouble again...