Pure Yoga: A Translation from the Sanskrit into English of the Tantrik Work, the Gherandasamhita, with a Guiding Commentary

I am enjoying this translation.

The book came highly recommended and I was not disappointed

This is an excellent translation and commentary of a very important text. It is not generally known but this text is the root source for what is called Kriya Yoga, a series of secret exersises made popular by Yogananda. There are two other translations of this text which are not as good and which does not have a commentary.