Rejoice in My Gladness is a biography of one of the leading female voices, Tahirih, of the 1800s. The book tells how she began teaching the equality between men and women in largely Muslim Persia, and how she was eventually martyred for her outspokenness and courage in the face of the male governing establishment in Persia.

Rejoice in My Gladness follows the life of Tahirih from her birth through her adulthood, covering important events such as her marriage, her controversial conversion to the Bahá'í Faith, and her execution due to her beliefs and activities.

The reader will see how Tahirih changed the face of women's rights forever, as she was the first woman in recorded Middle Eastern history to remove her veil before an assembly of men. At her execution, her last words have been recorded as, "You can kill me as soon as you like, but you will never stop the emancipation of women."