The book was originally uploaded into the Kindle library in PRC format only. I have recreated the book with a first edition dust jacket cover, and a frontispiece, for epub, azw3 and mobi formats.
Although presented as a novel, this book is a collection of short stories. There are a few sentences of "bridging text" at the beginning of each new story, but otherwise the stories are as previously published in magazines. I have slightly modified the Contents page to identify the individual stories.
I. The War Terror
―II. The Electro-Magnetic Gun
―III. The Murder Syndicate
IV. The Air Pirate
―V. The Ultra-Violet Ray
―VI. The Triple Mirror
VII. The Wireless Wiretappers
―VIII. The Houseboat Mystery
―IX. The Radio Detective
X. The Curio Shop
―XI. The "Pillar of Death"
―XII. The Arrow Poison
XIII. The Radium Robber
―XIV. The Spinthariscope
―XV. The Asphyxiating Safe
XVI. The Dead Line
―XVII. The Paste Replica
―XVIII. The Burglar's Microphone
XIX. The Germ Letter
―XX. The Artificial Kidney
―XXI. The Poison Bracelet
XXII. The Devil Worshipers
―XXIII. The Psychic Curse
―XXIV. The Serpent's Tooth
XXV. The "Happy Dust"
―XXVI. The Binet Test
―XXVII. The Lie Detector
XXVIII. The Family Skeleton
―XXIX. The Lead Poisoner
―XXX. The Electrolytic Murder
XXXI. The Eugenic Bride
―XXXII. The Germ Plasm
―XXXIII. The Sex Control
XXXIV. The Billionaire Baby
―XXXV. The Psychanalysis
―XXXVI. The Ends of Justice
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