The two sisters also believed that women's rights were as important as abolishing slavery. The two sisters were attacked because of their views. Even other abolitionists attacked them because they considered their ideas “to extreme.” Even in these hardships Sarah still managed to publish “Letters on the Equality of the Sexes and the Condition of Women” in the Massachusetts newspaper in 1837. Sarah and Angelina also joined the American Anti-Slavery Society but also faced much criticism because of their public speeches. The sisters spoke to mixed-gender audiences and that was considered unwomanly at the time. In the book “Invention of Wings” Sarah Grimke’s life is shown from when she was around 12 old onwards. In the book Sarah gets Hetty as a present. While Hetty’s life is fantasized quite a bit Sarah’s is not and is represented very well. Sarah teaches Hetty how to read. The author voices Sarah’s thoughts and actions throughout the book and shows her ideas about the abolition of slavery and her ideas of women's