Has the Old Testament Psalter been purposefully arranged? Does this arrangement convey an overall message? This book enters into the growing discussion regarding the canonical arrangement of the Psalms by examining Book IV (Pss 90-106) and considering the book's overall theological and thematic message within the literary context of the Psalter. This volume argues that Psalms 90-106 have been purposely arranged as a rejoinder to the previous three books, in response to the rise and fall of Davidic kingship. This hypothesis is tested by examining how Psalms 90-106 may have been purposely organized as a collection.