A Psalm is basically a poem set to music and sung. For centuries the Psalms would have been the most familiar part of scripture to people who had no access to books. They are not only an integral part of the shared experience of the church but they also communicate God's guidance to this world, reveal his character and encourage his people. In his previous volume Eric taught us about the first three books of the Psalms (Psalms 1 to 89). In...