Talk:Day 171-180/@comment-4784862-20150519090023/@comment-24.243.240.251-20150519192606

I think all the Psalms are in one general book. For example, the Psalms of the entire world are known as the "World Psalms". This one overal book contains segments that are more specific, the "Frontier Psalms". So, the "Frontier Psalms" are like a chapter inside the "World Psalms".... thats how I understood it.