This book while only some 280 pages long was one of the most dense books I have ever read. While difficult to comprehend intellectually, Elaborations on Emptiness provides an in depth study of the Heart Sutra. It's focus is mainly Indian and Tibetan commentaries. The many Sanskrit and Tibetan terms challenge readers further. I suggest at least a basic knowledge of Sanskrit and Tibetan terms or a dictionary. A scholarly contribution to Buddhist Studies.
This book is an excellent companion to Thich Nhat Hanh's The Heart of Understanding. Elaborations on Emptiness goes into scholarly depth, including translations and discussions of five major sets of commentary on the Heart Sutra. Fully annotated and referenced to the two major Chinese and Tibetan editions, this is an outstanding detailed study of the sutra, its interpretations and deep meaning. I recommend it highly to anyone interested in Buddhism.