The invisible master

by Edmond Hamilton

The Invisible Master

By EDMOND HAMILTON

Author of
The Hidden World, Cities in the Air, etc.

Illustrated By RUGER

[Transcriber's Note: This etext was produced from
Scientific Detective Monthly April 1930.
Extensive research did not uncover any evidence that
the U.S. copyright on this publication was renewed.]

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A thousand alarms are pouring into Police Headquarters! The Invisible Master broods over the city! Who is He? We defy any reader to guess the secret! Even the editorial staff of SCIENTIFIC DETECTIVE MONTHLY was astounded at the conclusion of this scientific yarn. Write and tell us if you were able to foretell the ending.

If you were to ask us which, in our opinion, is the greatest scientific detective story of the year, we certainly would pronounce the present story to be that unusual gem.

Here is a story that will keep you fascinated, not only in connection with its excellence of science, understandable by everyone, but by the fast-moving action for which this well-known author is famous.