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 and Embracing the Mnemonic rules, called 'Yoga-System of Patanjali' and the comment, called 'Yoga Bhasya' attribute to Veda Vyasa and the explanation, called 'Tattva-Vaisaradl' 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-vaisa-radi-Book 1, Concentration (samadhi), 2. Book 2, Means of attainment (sadhana) Book 3, Supernormal powers (vibhuti) Book 4, Isolation (kaivalya).