The Group Mind / A Sketch of the Principles of Collective Psychology

The Sexual Question / A Scientific, psychological, hygienic and sociological study

The World's Greatest Books — Volume 13 — Religion and Philosophy

The World's Greatest Books — Volume 14 — Philosophy and Economics

Talks To Teachers On Psychology; And To Students On Some Of Life's Ideals

Taboo and Genetics / A Study of the Biological, Sociological and Psychological Foundation of the Family

The Symbolism of Freemasonry / Illustrating and Explaining Its Science and Philosophy, Its Legends, Myths and Symbols

Applied Psychology for Nurses

Miracles and Supernatural Religion

The Philosophy of the Moral Feelings

The Wonders of Instinct / Chapters in the Psychology of Insects