The Bliss of Inner Fire - Heart Practice of the Six Yogas of Naropa — by Lama Yeshe
The author follows Je Tsongkhapa's (1357-1419 a.d.) text - Having the Three Convictions - and introduces the renowned Six Yogas of Naropa, focusing mainly on the first of these six - the practice of "inner fire".
Path and Grounds of Guhyasamaja According to Arya Nagarjuna — by Yangchen Gawai Lodoe
This work by an eminent 18th century scholar is a brief but lucid and highly acclaimed treatise. It maps out the two stages of Guhyasamaja - 'king' of Highest Yoga Tantras. The work is presented here with a commentary by Geshe Lobsang Tsephel.