In 1622, forty years after her death, she was canonized by Pope Gregory XV, and in 1970 named a Doctor of the Church by Pope Paul VI. Her books, which include her autobiography, The Life of Teresa of Jesus, and her seminal work, El Castillo Interior (The Interior Castle), are an integral part of the Spanish Renaissance literature as well as Christian mysticism and Christian meditation practices as she entails in her other important work Camino de Perfección (The Way of Perfection).
The Way of Perfection is a method for making progress in the contemplative life written by St. Teresa of Ávila for the sisters of her reformed convent of the Carmelite Order (Discalced). St. Teresa was a major figure of the Catholic Reformation in 16th Century Spain, and eventually was named the Doctor of the Church, while her work became classic text in Christian spirituality, mysticism, especially in the realm of prayer in Christianity, and Spanish Renaissance literature.
St. Teresa called this a "living book" and in it set out to teach her nuns how to progress through prayer and Christian meditation. The first 18 of the 42 chapters discuss the rationale of being a Carmelite, the rest deal with purpose and approaches to spiritual life.
You can purchase other religious works directly from Wyatt North Publishing.