This book, the 11th of 14 in the Fu Manchu series, is a short and minor entry in the Fu saga, but nonetheless a compact and suspenseful one. In many of the previous books, the Fu man sets his sights on a scientific genius and designs to either kidnap him, steal his invention or kill him in a macabre manner. This action is usually given a chapter or two and takes the form of an unusual episode in the larger scheme of the plot.
This time around, the entire book is concerned with Fu's plans regarding Dr. Morris Craig's new energy weapon. While the weapon's ultimate use is never really spelled out, it seems to be some kind of disintegrator that can also be used as a potential source of limitless energy. This is the type of book that can be called a whodunnit,as well as a howdunnit and a whydunnit; all of the characters can be viewed as suspects. Even the characters that we are pretty sure are "good guys" can be guilty of misdeeds, given the Fu man's powers of hypnosis and mind control. Thus, the reader is unsure till the very end of the book why people do what they do and act the way they act. Who is the British agent? Who is the Russian agent? Who is the secret FBI agent? You get the idea. The Fu man's main goal in this book seems to be to thwart the Communists from getting control of Dr. Craig's energy weapon; thus, he comes off a little more sympathetically than in some of the other entries in the series. The action this time takes place in the Big Apple and in a country estate in the Connecticut countryside. The estate scene is a very suspenseful sequence indeed. The book also features a memorable character named M'goyna, a Turkish zombie who is more gorilla than man. He is one of Fu's more remarkable henchmen. Also featured is a Sevillian torture chair that lowers a skull-crushing canopy onto the occupant; one of the Dr.'s more grisly inducements.
The book contains fewer inconsistencies than others in the series. I did notice some things that bothered me, however. The author often refers to Fu Manchu speaking sibilantly, but often this will happen when the sentence Fu has just spoken contains no "s" or "sh" sounds at all! How can this be? Also, in one point of the book, Nayland Smith, our eternal Fu fighter, says that Fu's drug for paralyzing the speech muscles wears off with time. He says that Fu told this to him. However, we are never shown Fu saying this, and indeed, when Smith was thus paralyzed, he needed an antidote injection to counteract the effects of the drug! It also doesn't make sense that {WARNING: SPOILER AHEAD} Fu Manchu has already possessed the prototype of Craig's invention for many years. Why hasn't he taken over the world decades ago, with an invention such as this? But quibbles aside, I feel that any fan of fast-paced action, with a tinge of sci-fi and mystery thrown in, will enjoy this short but fun entry in the Fu series.