A useful version of the traditional text of the Haggadah, with introduction and translation, can be found in the widely available edition of Nahum N. Glatzer, The Passover Haggadah (New York: Schocken Books, 1981). Those interested in appreciating how the Haggadah brings together material from various historical periods might look at Jacob Freedman, Polychrome Historical Haggadah for Passover (Springfield, MA: Jacob Freedman Liturgy Research Foundation, 1974).