All of Dr. Bird and Operative Carnes adventures in one book!

Dr. Bird, scientific sleuth extraordinary, goes after a sinister stealer of brains.

Dr. Bird and his friend Carnes unravel another criminal web of scientific mystery.

In the underground caverns of the Selom, Dr. Bird once again locks wills with the subversive genius, Saranoff.

Again Dr. Bird closes with the evil Saranoff-this time near the Aberdeen Proving Ground, in a deadly, mysterious blanket of fog.