How to Know Higher Worlds 2014. The Bamford translation of "Knowledge of the Higher Worlds and Its Attainment" (CW 10) by Rudolf Steiner.
The alternate translation if also available on this website.
The Entire Book as a zip file
0. Prefaces by Rudolf Steiner
1. How to Know Higher Worlds
2. The Stages of Initiation
4. Practical Considerations
5. Requirements for Esoteric Training
6. Some Effects of Initiation
7. Changes in the Dream Life of the Esoteric Student
8. Achieving Continuity of Consciousness
9. The Splitting of the Personality in Esoteric Training
10. The Guardian of the Threshold
11. Life and Death: The Great Guardian of the Threshold
12. Epilogue (1918)