For each symbol a scriptural reading is suggested, a short reflection is given as is a final prayer.
Symbols include: the Jesse tree, the birth of life, Adam and Eve, Noah and the flood, Father Abraham, Isaac and the ram, Jacob and his dream, a symbol of prophecy, Jospeh and his coat, Moses and the law, the blessing of Aaron, Samuel and the Word of the Lord, David, symbol of shepherds, the wisdom of Solomon, Elijah and the Raven, Elisha and healing, Isaiah, Jeremiah, Nehemiah the builder, angels, Zechariah and Elizabeth, Virgin Mary, Magnificat, the birth of John the Baptizer, Joseph of Nazareth, the symbol of Bethlehem and the birth of the Lord.
My only quibble with the list is that, in keeping with the geneology of Matthew, I would like to see Ruth included.