"The Knowledge of Man: A Philosophy of the Interhuman" is a philosophical work by Martin Buber that explores the nature of human relationships and the concepts of "I-Thou" and "I-It" in the context of interpersonal communication. The book focuses on how people understand each other and live in community, emphasizing the significance of genuine, reciprocal relationships.

In this book, Buber develops his idea of authentic dialogue, highlighting the importance of sincere "I-Thou" encounters, which transcend objectification and utilitarian perspectives. It examines concepts of personhood, truth, and human existence within the framework of interhuman relations.