Head Full of Sun celebrates poetry and language's rich spiritual heritage by weaving together the biblical and the personal. Carla Funk uses biblical forms and stories to explore the human condition and give blood and bone to the spiritual. These poems lament, question and sing praise as they wrestle with the divine.

In the main component of this collection, Funk has created an "Alphabet of Psalms" that works to find a song in every corner of Earth's many rooms. These twenty-six poems are modelled after Psalm 119, which uses each letter of the Hebrew alphabet for its twenty-two segments. In another section, Funk pulls the lives of biblical women from the background, giving them the opportunity to articulate the untold portion of the story. And finally, she takes on Revelations, a book that inspired sermons that terrified her as a child but which she has come to appreciate as a "richly poetic book with imagery to envy."

From Eve in Eden to the apocalyptic imagery of Revelations, Funk translates theology into a convincing and down-to-earth human tongue, pushing through the veil for an intimate look at God.