Publisher's Synopsis
Tom Swift Among the Diamond Makers, Or, The Secret of Phantom Mountain, is Volume 7 in the original Tom Swift novel series published by Grosset & Dunlap.Tom Swift flies his airship to the mountain tops of Colorado to seek for the secret of the Diamond Makers: criminal scientists who have figured out the formula of manufacturing a limitless fortune in diamonds. But these rogues will stop at nothing to keep their secret. Tom & friends are soon captured and left to die in a collapsing mountain.
