The Documentary Hypothesis, which in the 20th century was the standard theory to explain the development of the Pentateuch, has been challenged from different angles. One important text corpus where new proposals have been brought into the debate is the Book of Numbers. The articles in this volume address the formation of the Book of Numbers from the earliest to the latest strata. They focus on topics like the source-critical placement of the texts in Deuteronomy that retell events from Numbers, the status of the late priestly halakhic legal adaptations and their relation to the books of Levit.