The book 'Science of Soul' by 'Swami Yogeshwarananda' talks about five koshas ( vigyanmay kosh, anandamay kosh ).
It talks about journey after ones kundalini is fully awakened to moksha. It is quite a fascinating book.
""Science of Soul" by Yogeshwarananda was published in 1959 in Hindi. This book is quite difficult to obtain but it is nevertheless one of the best documented books on the esoteric science of Raja Yoga. This book was translated into English by Swami Jyotirmayananda (of the Sivananda Ashram Rishikesh) in 1964 for the benefit of many.Then in French by Gilbert Durand Association of Divya Niketan"
Yes, that is indeed a great book. I have three of his books. Presents a very "traditional" yogic path where actual cognition or vision of the subtle nature is used.