If you want, I can:
The single best PDF to search for is the revised edition published by .
"Yoga Nidra is not a technique of relaxation. It is a technique of de-conditioning." – Swami Satyananda Saraswati
The definitive text for this practice is the book by Swami Satyananda Saraswati
Swami Satyananda Saraswati, the founder of the Bihar School of Yoga, systematized Yoga Nidra in the 1960s. He adapted ancient Tantric practices into a structured method that anyone, regardless of their yogic experience, could follow. His seminal book, Yoga Nidra , remains the "gold standard" for practitioners and teachers worldwide.