The Book of Psalms is the nineteenth book of the Bible collection of hymns and poetry written primarily by King David. It is the first book of poetry in the Bible. The Psalms serve as praise from David and various other smaller authors to God. The Psalms in themselves allude to many of the historical events occurring at the time and were/are usable as hymns and songs, particularly by Israelite musicians.
The literary style of the Psalms are written in what in poetry in a literary form called Synonymous Parallelism, which is when the main themes of the poem are restated in successive lines. Generally speaking The first half of a verse will make a statement, and the second half will essentially say the same thing in different words. The statements are “parallel” in that they are juxtaposed, or side by side, and they often share similar syntax.
There have been many authors that have contributed to the Book of Psalms as they were put together during Biblical times from the time of Moses to the Babylonian Exile. Known authors are King David, Asaph and his family, The sons of Korah, King Solomon, Moses, and Heman and Ethan the Ezrahites.