Thomas à Kempis 
The Imitation of Christ [EPUB ebook] 
Admonitions Profitable for the Spiritual Life, Admonitions Concerning the Inner Life, on Inward Consolation and of the Sacrament of the Altar

The Imitation of Christ is a Christian devotional book. It is a handbook for spiritual life arising from the Devotio Moderna movement, a movement for religious reform, calling for apostolic renewal through the rediscovery of genuine pious practices. With the exception of the Bible, no Christian writing has had so wide a vogue or so sustained a popularity as this. Its structure it owes largely to the writings of the medieval mystics, and its ideas and phrases are a mosaic from the Bible and the Fathers of the early Church. But these elements are interwoven with such delicate skill and a religious feeling at once so ardent and so sound, that it promises to remain, what it has been for five hundred years, the supreme call and guide to spiritual aspiration.
Contents:
Admonitions Profitable for the Spiritual Life
Admonitions Concerning the Inner Life
On Inward Consolation
Of the Sacrament of the Altar