The Psychology of Darsanamala
Vol. 1. Pages:627 
Book Summary: (Sourced from Scott Teitsworth)

The Psychology of Darsanamala is the magnum opus of Nitya Chaitanya Yati, an increasingly well-regarded Vedantic philosopher and writer from South India. The work is presented as a commentary on the Darsanamala of Narayana Guru, one of modern India's most brilliant mystic philosophers and poets. It was Narayana Guru who instructed Nataraja Guru, who in turn taught Nitya Chaitanya Yati, so there is a direct line of understanding represented in this book. 
The Psychology of Darsanamala is a thoroughgoing exposition of psychological states from the origin of individual consciousness to its extinction in nirvana. In the past, such large-scale undertakings have been to a greater or lesser extent heterogeneous and unsystematic. By using the elegant framework of Darsanamala to properly organize the structure of the book, Guru Nitya has added an important dimension to this perennial study and at the same time made a significant contribution to the presentation of Indian psychology and philosophy. The reader will find that such a systematic presentation helps bring Indian psychology out of the realm of hypothetical speculation and into the arena of everyday life where it can be of immediate and practical use.