THE SIAMESE TWIN MYSTERY is superlatively “different.” It accomplishes the difficult task of combining provocative clues, thought-compelling logic and an amazing and inexorable mathematical solution with sheer story — the story of a bewildered group of people isolated on a mountain-top by a forest fire below... menaced by a murderer within and a flaming death without — truly caught between two fires. Mr. Queen handles his story elements — the growth of fear, the interplay of emotion, the delineation of common people helpless before an uncommon situation — equally as superbly as he docs his mystery and detective elements, in the concoction and treatment of which he is a past master