Perhaps Sir John Woodroffe's books should be categorised as classics. For his study of Tantra Sastra and the academic writings he wrote in English, one owes him a duty of gratitude. His books, including "Serpent Power," "Sakti and Sakta," etc., have greatly aided readers in learning about Tanta Sastra, a subject that is notoriously challenging to understand. Similar to other masterpieces, the author of this book has provided a thorough explanation of the importance of the Letters in the framework of Tantra knowledge. As a result, it becomes a requirement for Tantra Vidya students.