《Tom Swift in the Caves of Ice》 - 免费有声读物

Tom Swift & friends journey to the Arctic in his custom airship to seek for the legendary Valley of Gold. When his map is stolen by his longtime nemesis, Andy Foger, who has himself built a competing airship, the race is on across frigid Alaska to see who will be the first to find the limitless fortune. (Summary from Wikipedia) This is book eight in the original Tom Swift series.