The Fundamentals of K.C. Bhattacharyya’s Philosophy is the only exhaustive exposition of Krishnachandra Bhattacharyya’s seminal philosophical ideas. Kalidas Bhattacharyya, son of Krishnachandra Bhattacharyya, had the opportunity of a prolonged critical exposure to this unique tradition. This monograph deals with Krishnachandra Bhattacharyya’s epistemic and metaphysical line of thought from the definite to the indefinite, from the objective level to the higher levels of subjectivity, and from association to dissociation or freedom leading to an alternation between knowledge and freedom. Both definiteness and indefiniteness have been identified. The two, however, do not have a coordinate status. There is an alternation between them. One and the same situation could be alternatively understood as definite or as indefinite. This leads to Krishnachandra Bhattacharyya’s well-known philosophical position of “Alternative Standpoints”. The indefinite has to be made definite through layers of transcendental knowledge. The absolute-as-transcendental-knowledge is related to the understanding of the absolute-as-transcendental-will. “The predatory outlook of the scientific intellect” has been referred to and insightful correctives have been offered. Krishnachandra Bhattacharyya’s style of writing is commensurate with the rigour and subtlety of his philosophy. The uninitiated requires a roadmap. This need is amply fulfilled by the present work. The monograph focuses on epistemology and metaphysics. The insights gained through this faithful commentary will help advanced readers to develop their own philosophical pursuits and the beginner will receive a good grounding.