An unseen weapon that drives men mad . . . A green gas which turns smiling faces into leering skulls . . . A master criminal who can assume at will any known identity . . . Add to these separate menaces three big-game hunters sworn to destroy the Spider -- and you have a situation in which the brilliance and courage of Dick Wentworth will thrill you as never before!

 

A facsimile reprint of the original pulp magazine.