The author has in this work clearly marked the principal stages of Indian logic in the vast period of about two thousand years beginning from 640 and has traced how from Anviksiki the science of debate Indian logic developed into the science of knowledge Pramanasastra and then into the science of dialectics Prakarana of Tarkasastra.The treatment of the subject is both historical and critical. The author has traced some Greek influence on indian logic. For instance he has shown how the five membered syllogism of Aristotle found its way through Alexandria Syria and other countries into Taxila and got amalgamated with the Nyaya doctrine of inference.The book is one of the pioneer works on the subjects. It has drawn on original sources exhaustively. Besides the preface introduction, foreword and table of contents the work contains several appendices and indexes.

Ethics and the History of Indian Philosophy, by Shyam Ranganathan, presents a compelling, systematic explication of the moral philosophical content of history of Indian philosophy in contrast to the received wisdom in Indology and comparative philosophy that Indian philosophers were scarcely interested in ethics. Unlike most works on the topic, this book makes a case for the positive place of ethics in the history of Indian philosophy by drawing upon recent work in metaethics and metamorality, and by providing a through analysis of the meaning of moral concepts and PHILOSOPHY itself- in addition to explicating the texts of Indian authors. In Ranganathan`s account, Indian philosophy shines with distinct options in ethics that find their likeness in the writings of the Ancient in the West, such as Plato and the Neo-Platonists, and not in the anthropocentric or positivistic options that have dominated the recent Western tradition.

The work appears in five volumes. Vol. I comprises Buddhist and Jaina Philosophy and the six systems of Hindu thought, viz.., Samkhya, Yoga, Nyaya, Vaisesika, Mimamsa and Vedanta. It also contains the philosophy of the Yogavasistha, the Bhagavadgita and speculations in the medical schools. Vol. III contains an elaborate account of the Principal Dualistic and Pluralistic Systems such as the philosophy of the Pancaratra, Bhaskara, Yamuna, Ramanuja, Nimbarka, Vijnanabhiksu and philosophical speculations of some of the selected Puranas. Vol. IV deals with the Bhagavata Purana, Madhva and his School, Vallabha, Caitanya, Jiva Gosvami and Baladeva Vidyabhusana. Vol. V treats the Southern Schools of Saivism, viz., Saiva Siddhanta, Vira Saivism, philosophy of Srikantha. Saiva Philosophy in the Puranas and in some important texts. In the words of the Oxford Journal 'the collection of data, editing and the interpretation of every school of thought is a feat unparalleled in the field of history of philosophy.'

Some postcolonial theorists argue that the idea of a single system of belief known as "Hinduism" is a creation of nineteenth-century British imperialists. Andrew J. Nicholson introduces another perspective: although a unified Hindu identity is not as ancient as some Hindus claim, it has its roots in innovations within South Asian philosophy from the fourteenth to seventeenth centuries. During this time, thinkers treated the philosophies of Vedanta, Samkhya, and Yoga, along with the worshippers of Visnu, Siva, and Sakti, as belonging to a single system of belief and practice. Instead of seeing such groups as separate and contradictory, they re-envisioned them as separate rivers leading to the ocean of Brahman, the ultimate reality. Drawing on the writings of philosophers from late medieval and early modern traditions, including Vijnanabhiksu, Madhava, and Madhusudana Sarasvati, Nicholson shows how influential thinkers portrayed Vedanta philosophy as the ultimate unifier of diverse belief systems. This project paved the way for the work of later Hindu reformers, such as Vivekananda, Radhakrishnan, and Gandhi, whose teachings promoted the notion that all world religions belong to a single spiritual unity. In his study, Nicholson also critiques the way in which Eurocentric concepts—like monism and dualism, idealism and realism, theism and atheism, and orthodoxy and heterodoxy—have come to dominate modern discourses on Indian philosophy.