Ich und Du – Martin Buber Leipzig: Insel-Verlag, 1923. 137 pages. 21cm x 12.8cm. Custom half-vellum binding with brown boards, gilt lettered spine, and black top edge. First edition of "Ich und Du" (I and Thou), a philosophy of dialogue centered on the two fundamental ways humans engage with the world: the genuine, mutual I-Thou relationship and the detached, objectifying I-It relationship. Some rubbing, bumping, wear, and soiling to the boards and spine. Pencil markings in the text and in the margins throughout. Only very little browning and spotting throughout. The text is clear, and the paper is crisp, and the binding is solid. Overall, an attractive copy in very good condition.