In the final book of the Yoga Sūtras called Kaivalya Pāda, Patañjali reveals the nature and implications of liberation (kaivalya). Kaivalya means complete isolation: the isolation of puruṣa or higher consciousness from prakṛti or nature or matter. This is the isolation of the Self in itself, free from ignorance and dualistic notions.
The book is published as an e-Book using the International Alphabet of Sanskrit Transliteration (IAST).