The contents of this book are:
    How is Knowledge of the Higher Worlds Attained?
    The Stages of Initiation
    Initiation
    Some Practical Aspects
    The Conditions for Esoteric Training
    Some Effects of Initiation
    The Transformation of Dream Life
    The Continuity of Consciousness
    The Division of Personality during Spiritual Training
    The Guardian of the Threshold
    Life and Death, The Greater Guardian of the Threshold

GA 10 Selections ...

The Way of Initiation (English, 1960)

This book is an early version of the first half of the book entitled Knowledge of the Higher Worlds and Its Attainment. The book Initiation and Its Results corresponds to the second half of Knowledge of the Higher Worlds and Its Attainment.
Chapter titles are: The Superphysical World and Its Gnosis, How to Attain Knowledge of the Higher Worlds, The Path of Disciple- ship, Probation, Enlightenment, Initiation, The Higher Education of the Soul, and, The Conditions of Discipleship.

Initiation and Its Results (English, 1909)

Initiation and Its Results is an early version of the second half of the book entitled Knowledge of the Higher Worlds and Its Attainment.
Chapter titles are: The Astral Centers(Chakras), The Constitution of the Etheric Body, Dream Life, The Three States of Consciousness, The Dissociation of the Human Personality During Initiation, The First Guardian of the Threshold, and, The Second Guardian of the Threshold — Life and Death.

---

Knowledge of the Higher Worlds and Its Attainment (English, 1947)

This book, perhaps the most controversial of Steiner's extensive literary legacy, suggests the possibility of a person in the 20th century developing sufficient skills of concentration, empathy, etc. to be able to obtain first-hand knowledge of spiritual realities consciously. In the collected edition of Rudolf Steiner's works in German, the volume containing the German text is entitled Wie Erlangt Man Erkenntnisse der Hoeheren Welten?, (Vol. 10 in the Bibliographic Survey). This translation into English was made by George Metaxa, with revisions by Henry B. Monges.

Knowledge of the Higher Worlds and Its Attainment (English, 1975)

Knowledge of the Higher Worlds and Its Attainment constitutes a fundamental guide to the anthroposophical path of cognition or knowledge. In human consciousness, faculties are sleeping that, if awakened, lead to life-giving wisdom. With great clarity and warmth, Rudolf Steiner details the exercises and moral qualities to be cultivated on the path to a conscious experience of supersensible realities.

---

L'initiation (French)

Cela fût considérablement réécrit, et la nouvelle version est apparue en traduction anglaise en 1923 avec les titres ci-dessus. Ce livre, probablement le plus controversé du vaste héritage littéraire de Steiner, suggère la possibilité d'une personne au 20e siècle développant une habileté suffisante de concentration, d'empathie, etc. pour être capable d'obtenir consciemment une connaissance de première main des réalités spirituelles.