Originally presented as a series of nearly 130 talks, the Theology of the Body is of considerable length, and the link below is to a currently available translation.
The work covers such topics as the unified corporeal and spiritual qualities of the human person; the origins, history and destiny of humanity; the deepest desires of the human heart and the way to experience true happiness and freedom; the truth about man's need and desire for loving communion derived from the revealed understanding of humanity in the image of a Triune Creator; the truth about God's original design for human sexuality and thus the dignity of the human person, how it was distorted through sin, and how it has been restored and renewed through the redemption of Jesus Christ; and Catholic teachings about the sacramentality of marriage.