
audiobook
CHAPTER IA STRANGE PROPOSAL
CHAPTER IIOFF FOR MOLOKAI
CHAPTER IIIOVER THE PACIFIC
CHAPTER IVMOLOKAI AT LAST
CHAPTER VSEARCHING
CHAPTER VITHE CELLS RECOVERED
CHAPTER VIIWHERE IS GORDON?
CHAPTER VIIIGORDON KIDNAPPED
CHAPTER IXSOLVING A MYSTERY
CHAPTER XTHE JAP’S RETURN
The Hunniwell brothers spend their summer days tinkering in a remote Maine wilderness, turning an out‑of‑sight pond into a launchpad for a sleek, battery‑powered plane they’ve built from a handful of copper cells. Between hauling prize fish and wrestling with makeshift shutters, they revel in the freedom of flight, yet their quiet routine is soon interrupted by a knock at the door. An unexpected visitor from the Secret Service arrives, bearing a confidential request that hints at a hidden treasure of mysterious platinum.
Drawn into a fast‑moving puzzle, the boys must blend their mechanical ingenuity with daring resourcefulness to unravel clues before the season ends. Along the way, they navigate secret channels, evade curious onlookers, and confront the limits of their own courage. The story captures the exhilaration of youthful invention and the suspense of a midsummer mystery, inviting listeners to soar alongside the brothers as they chase a secret that could change everything.
Language
en
Duration
~3 hours (227K characters)
Release date
2025-07-17
Rights
Public domain in the USA.
1873–1950
Best known for brisk adventure stories for young readers, this early-20th-century American writer mixed outdoor action with science, invention, and travel. His books often follow capable boys from Maine into forests, rivers, and far-flung expeditions.
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