David - shepherd boy to the great king of Israel. When we left the Book of Ruth, David's lineage was traced out. The books of I & II Samuel tell David's life story. From this point of the Bible on - nearly every book of the Bible mentions him or references his life. God even says that David is, "A man after His own heart!" - no one gains greater Heavenly accolades except Jesus! Understanding David is key then to knowing God.