A criminal master of mind-control conspires to sell the ultimate weapon of terror and destruction to the Nazis. Only Doc and his daring crew can stop him. They trail their malevolent quarry to the frozen Arctic sea -- and fall into an icy evil trap of machine guns, U-boats and sheer insanity! (Bantam renamed this "One-Eyed Mystic")

Here's another of Doc as James Bond. It's staggering to think how much Doc influenced the action fiction that followed his adventures. In the early days, he's the forrunner of Superman and Batman, he uses the neck pinch long before a certain Vulcan, and he gives James Bond a run for his money towards the end. This one has all the trappings of a spy thriller. Enemy agents, mircofilm, a neat switcheroo on an airplane, and stolen riches. A great example of Doc from this era. I highly recommend it.

By this point in the series, Dent was recycling story ideas from earlier adventures. The clever plot device used on Renny is the exact same one used before in "Mad Mesa".