1.      Judy Hall: Crystal Bible

2.     Judy Hall: The Crystal Bible Volume 2.

3.      Judy Hall: The Crystal Bible Volume 3.

4.     Sonja Heider: Handbuch der Heilsteine

5.      Shalila Sharamon, Bodo J. Baginski: Das Chakra-Handbuch

6.     Kenneth Meadows: Rune Power. The Secret Knowledge of the Wise Ones