George De Lawrence

How to answer questions in crystal gazing: how to lead up to questions, a study and analysis of actual questions, actual questions for practice study

Chicago 1922.

Martins Oliveira

Inaudisme scientifique: divination instantanée du jour de la semaine

1924.

G.B. Seybold

They Can See with Their Skin

Popular Science Monthly, dicembre 1925, p. 21.

Williams Larsen

The L.W. mindreading mysteries

1928.

David J. Lustig

Vaudeville mind reading and kindred phenomena

1929.

D.J. Lonergan

Slate-secrets: a professional treatise

1930.

Secret writing for the amateur detective

1930.

Theodore Annemann

Sh-h-h--!: it's a secret

Davenport & Co., London 1934.

Ralph W. Read

The calostro mind reading act: a new, complete, improved system for presenting an act demonstrating transcendent mentalism, or thought projection

1934.

Jean Hugard

Mental Magic with Cards

1935.