Rolf Rendtorff subjects, but was notable chiefly for his 1977 book, "Das überlieferungsgeschichtliche Problem des Pentateuch" ("The Problem of the Transmission of the Pentateuch"). The book was a study of the question of Pentateuchal origins (the question of how the first five books of the bible – Genesis, Exodus, Leviticus, Book of Numbers and Deuteronomy – came to be written), and appeared at the same time as two other important books, John Van Seters' "Abraham in History and Tradition" (1975), and Hans Heinrich Schmid's "Der sogenannte Jahwist" ("The So-called Yahwist") (1976). The three studies, appearing almost together, inaugurated a heated discussion in
Development of the Old Testament canon "Apocrypha" ("hidden"). To counter Luther's "heresy", the fourth session of the Catholic Council of Trent in 1546 confirmed that the deuterocanonical books were equally authoritative as the protocanonical in the Canon of Trent in the year Luther died. Following Jerome's "Veritas Hebraica" (truth of the Hebrew) principle, the Protestant Old Testament consists of the same books as the Hebrew Bible, but the order and division of the books are different. Protestants number the Old Testament books at 39, while the Hebrew Bible numbers the same books as 24. The Hebrew Bible counts Samuel, Kings, and Chronicles as one book each,