Mystic key that unlocks the door to the soul of man!
Subtitle: hypnotism, the world's greatest mystery! : the master science of the 20th century ...
Contributors: Harry Houdini Collection (Library of Congress)
Publisher: M. Young, publisher
Published: 1900
Place of publication: Brooklyn, N.Y
Language: eng
Number of pages: 32
Subjects: Hypnotism; Study and teaching
Other titles: Hypnotism, the golden key to the very soul of mankind; Hypnotism, the world's greatest mystery!
Notes: Advertisement for a 25-lesson course and book.

Cover title.

With: Chautard, Émile. Les révélations d'un magnétiseur ..., 1904.  Issued separately.