Susil Kumar Maitra, in this book, offers an analysis of some of the key metaphysical and logical ideas available in classical Indian philosophy. The book is divided into two parts: I. Metaphysics and II. Logic. Under the part ‘Metaphysics’ the author discusses the Buddhist doctrine of momentariness, Nyāya theories of causality, universal, samavāya, viśeṣa, self etc. The Nyāya proofs for the existence of god and the Sāṃkhya theory of plurality of puruṣa have also been presented. The author incorporates an analysis of Jaina’s theory of saptabhaṅginaya and Saṅkarācārya’s analysis of the idea of falsity. Under the Logic part, the author presents the different theories of perception, inference, śabda, upamāna, arthāpatti and anupalabdhi. The author also includes discussions on Apoha and theories of validity.