Where Duty Called; or, In Honor Bound

"Where Duty Called; or, In Honor Bound" by George Waldo Browne is an early 20th-century adventure story about three young engineers who find themselves in the middle of political chaos in South America. Harrie Mannering, Ronie Rand, and Jack Greenland accept an invitation to explore Venezuelan rubber forests, unaware of the danger that awaits them. Their exciting journey quickly turns perilous as they face revolutionaries, navigate treacherous waters, and survive being shot at while aboard the "Libertador". Captured by forces loyal to General Castro, the friends must find a way to escape and reunite with their companions, turning their expedition into a quest for survival and freedom.