

Why is a wealthy sportsman so frightened by the serpent design on a mysterious balloon that he begs Frank and Joe Hardy to protect him? And who stole the ancient life-size chess king which is to be presented to the winner of the world chess championship? Targets of diabolical...






![The clue of the hissing serpent, [Russian] B006G7ZRZO Book Cover](https://m.media-amazon.com/images/I/213mxWQ4StL._SL500_.jpg)

