Patanjali is the author of the book. Patanjali's sutras were written at some time in the fourth or fifth century of our era. The book 'Yoga-System of Patanjali' deals with Sanskrit Text with English Translation an Embracing the Mnemonic rules, called 'Yoga-System of Patanjali' and the comment, called Yoga Bhasya attribute to Veda Vyasa and the explanation called 'Tattva-Vaisaradi' of Vacaspati-Misra.
This book also deals with these topics like : Analytical summary of the yoga-sutras. The yoga-sutras translated without the comment of the explanation, Translation of Patanjali's yoga-sutras or mnemonic rules together with the Comment or Yoga-bhasya, attributed to Veda vyasa and Vacaspati misra's Explanation or Tattva-vaisaradi - Book 1, Concentation (Samadhi), 2. Book 2, Means of attainment (sadhana) Book 3. Supernormal powr(vibhuti) Book 4, Isolation (Kaivalya).