Kalu Rinpoche Secret Buddhism, The Vajrayana (PDF)

Kalu Rinpoche is beloved for his gentle, sincere, and straightforward way of presenting the Buddhist teachings. Having spent over 30 years meditating in hermitages and caves in the Himalayas, he achieved a profound level of realization.

Secret Buddhism teaches about the teachings of the Vajrayana and this has nothing to with it being secret. Rather they are practices which need guidance from a lama to be successful). This book covers the use of mantras, empowerments, the six dharmas of Naropa as well as teachings on the bardo (the period from death and the next lifetime.